问题 选择题

用NA表示阿伏加德罗常数的值。下列叙述正确的是

A.3.6g碳与3.36LO2一定条件下恰好完全反应,生成CO分子数一定为0.3 NA

B.6.9g钠与足量的CO2和H2O(g)混合气体充分反应,转移的电子数一定为0.3NA

C.0.1mol/L的氯化铝溶液中含有的氯离子数为0.3NA

D.标准状况下,2.24L氯仿中含有C-Cl数目为0.3NA

答案

答案:B

完形填空

                                                                         

短文填词(共10小题;每小题1分,满分10分)

阅读下列短文,根据以下提示:1)汉语提示,2)首字母提示,3)语境提示,在每个空格内填入一个适当的英语单词,并将该词完整地写在右边相对应的横线上。所填单词要求意义准确,拼写正确。

I feel very happy to receive your letter and here I'd like

to give you some a        on how to learn English.Above all,                            76. ____________

don't lose your heart. Many students find it _______ to learn English,                77. ____________

especially _______ write good English compositions.In my opinion,                    78. ____________

if you want to _______(改善)your writing, you should learn                               79. ____________

by heart as many English expressions and sentence p        as possible.      80. ____________

And at the same time try to use _______ in your compositions.I                         81. ____________

think just r        grammar rules is no use. And only by reading                         82. ____________

and writing a lot, _______ you be able to learn English well in an                            83. ____________

effective way.I definitely _______(相信) the most important                       84. ____________

thing is that you should _______ writing every day and never give up.                85. ____________

单项选择题