0  282207  282215  282221  282225  282231  282233  282237  282243  282245  282251  282257  282261  282263  282267  282273  282275  282281  282285  282287  282291  282293  282297  282299  282301  282302  282303  282305  282306  282307  282309  282311  282315  282317  282321  282323  282327  282333  282335  282341  282345  282347  282351  282357  282363  282365  282371  282375  282377  282383  282387  282393  282401  447090 

27. Ten years ________a long time in one's life.

A. has been             B. are             C. is                D. have been

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26. - It’s the office! So you     know eating is not allowed here.

- Oh, sorry.

A. must               B. will           C. may            D. need

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25. It is known to all that ____ computer was invented in the USA.

A. that                 B. /            C. the             D. one

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24. You will be late _____ you leave immediately.

A. unless               B. when         C. while            D. as

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23. Don’t leave your keys in the car. Someone might steal ________ .

A. one              B. that      C. this        D. it

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22. we can avoid _________ with rest and a balanced diet. A. ill                   B. to get ill        C. getting ill          D. be ill

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第一节  单项填空 (共10小题;每小题1分,满分10分)

从A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

例  It is generally considered unwise to give a child _______he or she wants.

A  however         B  whatever         C  whichever   D  whenever

答案是B。

21. Expo 2010 Shanghai China __________ on both ba{007}nks of the Huangpu River in the city of Shanghai, China, from May 1 to October 31, 2010.

A. is being held           B. is holding      C. will hold          D. holds

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25、(2009苏州)某课外活动小组为了测定一批石灰石中碳酸钙的质量分数,将石灰石样品研成粉末,然后取一定量的石灰石粉末与过量稀盐酸充分反应(假设石灰石中的杂质既不和酸反应,也不溶于水),过滤、洗涤、干燥后称量滤渣质量的数据如下表:

实验序号
样品的质量/g
滤渣的质量/g
第一次
3.4
0.3
第二次
3.6
0.4
第三次
5.0
0.5

(1)该样品中碳酸钙质量分数的平均值为:      (结果精确到0.1%)。

(2)引起三次实验数据差异的操作原因可能是:         

(3)若利用题(1)的结果,煅烧100t这种石灰石,理论上最多能得到氧化钙多少吨?(结果精确到0.1t)

2010年黄冈市西河中心学校化学复习专题之第五单元中考复习

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