0  374114  374122  374128  374132  374138  374140  374144  374150  374152  374158  374164  374168  374170  374174  374180  374182  374188  374192  374194  374198  374200  374204  374206  374208  374209  374210  374212  374213  374214  374216  374218  374222  374224  374228  374230  374234  374240  374242  374248  374252  374254  374258  374264  374270  374272  374278  374282  374284  374290  374294  374300  374308  447090 

26.-I’m going to Japan.

     -How long     you     there?

     A.are; stayed       B.did; stay          C.have; stayed    D.are; staying

试题详情

25.     he has made up, his mind to do something, nothing will stop him.

     A.Once             B.Before            C.Although       D.As soon as

试题详情

24.Never before    so highly successful in his attempts to change the weather slightly on a very small scale.

     A.man has been     B.man is            C.will man be     D.has man been

试题详情

23.-Why are they pulling down the houses?

     -      a new parking lot.

     A.Build                                  B.To build       

     C.Because of building                     D.Built

试题详情

22.-I think smoking is bad for your health. You see the sign “No Smoking” there.

     -Yes, I know. But I simply can’t      .

     A.give it away       B.give it in          C.give it out      D.give it up

试题详情

第一节单项填空(共l5小题;每小题l分,满分l5分)

     从A、B、C、D四个选项中,选出可以填人空白处的最佳选项.

21.-Why didn’t he come to the meeting?

     -The reason       this was      he forgot.

     A.about; why       B.for; why          C.for; that        D.about; that

试题详情

45.(10分)鸡冠的形状很多,除常见的单冠外,还有玫瑰冠,豌豆冠,胡桃冠等。鸡的羽

毛有翻毛的,非翻毛的和轻度翻毛三种。如果把豌豆和鸡与玫瑰冠的鸡交配,子一代全

是胡桃冠,林体上接近9:3:3:1。翻毛鸡与非翻毛鸡(正常)交配,子一代全是轻度

翻毛鸡,子二代1/4翻毛,2/4轻度翻毛,1/4正常。问:

  (1)从鸡冠的形状遗传判断,符合基因的       定律。

  (2)从鸡羽毛的遗传判断,符合基因的       定律。

  (3)如果用玫瑰冠的翻毛鸡与豌豆冠的非翻毛鸡交配,子一代全是胡桃冠轻度翻毛鸡,则子二代有       种表现型。

  (4)据题意,写出鸡羽毛的遗传图解。(若鸡羽毛由1对等位基因控制用A,a,表示:若由2对等位基因控制,用A,a和B,b表示,以此类推)

试题详情

44.(16分)下列图A为碳循环示意图,图B为食物网示意图,图C为某地区人口年龄组成曲线图。请据图回答:

  (1)生物群落中的碳进入无机环境的途径是         (填序号)。   (2)图B中有         条食物链,写出该食物网中能量损失最多的一条食物链

                ,能量流动的特点是           

  (3)若②中的种群及相互关系如图B,其中鹰和蛇的关系为             。若兔体内有机物增加10克,至少需要消耗植物     克。

  (4)图B所示生态系统的成分还应该有        (2种)。

  (5)如果不考虑其它因素,图C所示的人口年龄组成属于     型。

试题详情


同步练习册答案