IV单元达标 查看更多

 

题目列表(包括答案和解析)

(09宿迁)2009年6月1日,国家《食品安全法》正式实施,在食品行业中“免
检”一词已成为历史,“凡食品必检、不合格不上市”成为最基本原则。某检测站对某品牌
奶粉进行检测。取该奶粉样品100g,使其中蛋白质中的氮元素完全转变成氨气,用50g溶
质质量分数为9.8%的稀硫酸恰好完全吸收【2NH3+H2SO4=(NH42SO4】。计算并回答下列问题:
(1)产生氨气的质量。
(2)该奶粉中含氮元素的质量分数。
(3)奶粉中蛋白质含量的国家标准为:每100g奶粉中含蛋白质12g—25g。 蛋白质中氮元
素的平均质量分数为16%,则合格奶粉中氮元素的质量分数范围为      ;通过对比说明
上述检测的奶粉是否合格?
(4)上述奶粉若不合格,不法奶商为使其“合格”,常在奶粉中添加化工原料三聚氰胺(化学式C3N6H6),以提升奶粉检测中的含氮量,造成蛋白质达标的假象。请你计算100g上述不合格奶粉中至少需要加入多少克三聚氰胺,才能成为“合格”奶粉。
(友情提醒:2/3-0.0192≈0.65)

查看答案和解析>>

 

1.Who is wanted in the first advertisement?

   A. A teacher.   B. A policeman.    C. A witness.      D. A detective.

2.Any person who is qualified(合格) as an English teacher ________ first.

   A. will be interviewed                B. will work from 9 a.m. to 5 p.m.

   C. will be offered a good salary(薪水)   D. will organize a party

3.The person who can share the apartment with the young female student_____.

   A. should not smoke                 B. should not keep a pet

   C. had better be a female              D. A, B and C

4.Which of the “wanted” advertisements above have a similar meaning?

   A. I and IV        B. II and III       C. None.       D. I,II and III.

 

查看答案和解析>>

 

Earthquake Intensity & Observed Effects(强度与现象)

I.       Felt by only a few people under very special conditions.

II. Felt by only a few people at rest, especially on the upper floors of buildings.

III. Felt noticeably indoors, especially on upper floors of buildings.

IV. Felt indoors by many people, outdoors by a few; some awaked.

V.    Felt by nearly everyone; many awaked; dishes and windows break; plaster (灰泥) cracks (开裂).

VI. Felt by everyone; many frightened and run outdoors; heavy furniture such as tables and shelves moves.

VII.   Everyone runs outdoors; small to moderate (中等的) damage(损毁) in usual buildings.

VIII. Considerable (相当大的) damage in usual buildings; monuments(碑) fall.

IX.    Considerable damage in all buildings; ground cracks; underground pipes (管道) break.

X.      Most buildings damaged; rails bend(弯曲); landslides (山崩) take place; water splashes(溅落) over banks.

XI.    Few buildings left standing; bridges damaged; wide cracks in the ground; underground pipes break.

XII.   Damage total; waves seen on ground; objects thrown into air.

1.According to the picture, what is the possible position of the earthquake’s epicenter?

A. 36°N, 90°W.         B. 36°N, 90°E.  C. 90°N, 36°W.    D.90°N, 36°E.

2.What is the effects of earthquake intensity IV?

A. Everyone runs outdoors.

B. Only a few people feel it.

C. Many people who stay indoors feel it.

D. Felt by people on the upper floors of buildings.

3.According to the picture, which city would have announced the report: “Nearly everyone felt the earthquake, and many people were awaked. Dishes and windows were broken”?

A. Cincinnati.            B. Louisville.              C. Pittsburgh.  D. Nashville.

4.Which statement best describes the earthquake intensity at Boston?

A. Felt indoors by few people under very special conditions.

B. Few buildings left standing.

C. Felt noticeably indoors, especially on upper floors of buildings.

D. Felt indoors by many people, outdoors by a few, some awaked.

5.For which city was the description of an earthquake “Heavy furniture moved, everyone  felt it, and many were frightened and ran outdoors” reported?

A. Nashville.     B. Louisville.            C. Syracuse.    D. Cincinnati.  

 

查看答案和解析>>



Earthquake Intensity & Observed Effects(强度与现象)
I.       Felt by only a few people under very special conditions.
II. Felt by only a few people at rest, especially on the upper floors of buildings.
III. Felt noticeably indoors, especially on upper floors of buildings.
IV. Felt indoors by many people, outdoors by a few; some awaked.
V.    Felt by nearly everyone; many awaked; dishes and windows break; plaster (灰泥) cracks (开裂).
VI. Felt by everyone; many frightened and run outdoors; heavy furniture such as tables and shelves moves.
VII.   Everyone runs outdoors; small to moderate (中等的) damage(损毁) in usual buildings.
VIII. Considerable (相当大的) damage in usual buildings; monuments(碑) fall.
IX.    Considerable damage in all buildings; ground cracks; underground pipes (管道) break.
X.      Most buildings damaged; rails bend(弯曲); landslides (山崩) take place; water splashes(溅落) over banks.
XI.    Few buildings left standing; bridges damaged; wide cracks in the ground; underground pipes break.
XII.   Damage total; waves seen on ground; objects thrown into air.
【小题1】According to the picture, what is the possible position of the earthquake’s epicenter?

A.36°N, 90°W.B.36°N, 90°E.C.90°N, 36°W.D.90°N, 36°E.
【小题2】What is the effects of earthquake intensity IV?
A.Everyone runs outdoors.
B.Only a few people feel it.
C.Many people who stay indoors feel it.
D.Felt by people on the upper floors of buildings.
【小题3】According to the picture, which city would have announced the report: “Nearly everyone felt the earthquake, and many people were awaked. Dishes and windows were broken”?
A.Cincinnati.B.Louisville.C.Pittsburgh.D.Nashville.
【小题4】Which statement best describes the earthquake intensity at Boston?
A.Felt indoors by few people under very special conditions.
B.Few buildings left standing.
C.Felt noticeably indoors, especially on upper floors of buildings.
D.Felt indoors by many people, outdoors by a few, some awaked.
【小题5】For which city was the description of an earthquake “Heavy furniture moved, everyone  felt it, and many were frightened and ran outdoors” reported?
A.Nashville.B.Louisville.C.Syracuse. D.Cincinnati.

查看答案和解析>>

Breaking Bad Eating -Habits
Have you heard the expression "You are what you eat"? Well, do you like who you are’’
If not, break some bad eating habits and feel better about yourself.
Bad habit 1: ______________
Many packaged ( =" in" small bags) foods, such as frozen (纤维) dumplings ,rice rolls
and instant noodles (方便面) have lots of fat and calories (热量).
The solution: Read the instructions to find the healthiest foods that are low
in salt and nigh in fiber Also check to make sure they have ingredients such as
vegetables and grains When possible, use packaged foods as part of a "home-cooked"
meal. For example frozen (纤维) dumplings with fresh vegetables are better than
dumplings alone.
Bad habit 2:_____________________________________________
People without breakfast don’t have enough energy they need to get through the
morning. Eating breakfast improves your concentration, memory (冰冻的) and
mood.
The solution: Always keep a kind of quick foods like yogurt. Or have a standing
order a! breakfast place.
Bad habit 3:_______________________________________________
It takes your body at least 20 minutes to "tell" your brain that you are full,
 So last eaters usually eat more than people who eat slowly.
The solution: Try to slow down. Try eating at least some of your meals without I
V, hand phones or computers. Use a plate or bowl when you eat.
Bad habit 4:______________________ ______________
Healthy snacks between meals are fine. But when you snack instead of having real
meals, you will not eat your meals regularly. Plus, snack foods such as chips and
sweets aren’t very satisfying That makes it easy to overeat.
The solution: To get more energy, allow yourself two healthy snacks a day. Choose
snacks that will make you feel full. Try fruit, yogurt or nuts.
As we all know, bad habits can be broken. Take the first step toward a healthier
eating routine(常规)——star following these tips today!
【小题1】给文中的横线处选择合适的标题,并将其字母代号填写在下面的横线上.(2分)
a. You are a fast eater.
b. You often don’t eat breakfast.
c. All your meals come in packages.
d. You snack too much.
Bad habit 1:_____   Bad habit 2:_____   Bad habit 3:_____  Bad habit 4:_______
Bad habit 1:_c_ Bad habit 2:_b Bad habit 3:_a___Bad habit 4:d_______
【小题2】 列举出文中提到的三种packaged foods: (1 分)
_______________  ____________________  ___________________
【小题3】根据上下文,将文中划线句子译成汉语(2分)
It takes your baby at least 20 minutes to “tell” your brain that you are full.
                                                              
【小题4】根据文章内容完成句子。(2分)
No eating breakfast is bad influence on your_________________, __________________,______________________ and __________________________
【小题5】回答问题;How can you eat snacks healthily? (至少答出两种方式) (2分)
______________________________________________________________________________________________________________________________________________________________
【小题6】从文中找出与所给句子意思相同或相近的句子。(1分)
Your heaith depends on the food you eat.
_______________________________________________________________________________

查看答案和解析>>


同步练习册答案