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问题 选择题

下列有关物质分类或归类正确的一组是[ ]

①液氨、液氯、干冰、碘化银均为化合物

②氢氟酸、盐酸、水玻璃、氨水均为混合物

③明矾、小苏打、醋酸、次氯酸均为电解质

④碘酒、牛奶、豆浆、漂粉精均为胶体

⑤Na2O2、Na2CO3、NaHCO3、Na2SiO3均为钠盐

⑥CH3COONa 、 Na2CO3、NaHSO3、NaF溶液均为碱性

A．①和②

B．②和③

C．③和④

D．②③⑥

答案

答案：B

选择题

找出与句中画线部分意思相同或相近的选项。

1. An elephant is a large animal.        

A. big          

B. tall          

C. heavy      

D. thin

2. What' would she like?

A. do; want                                    

B. does; want

C. do; wants                                  

D. does; wants

3. Would you like to have dinner with us?

A. have noodles

B. have bread and milk

C. come to the evening meal

D. help to cook    

4. This shirt is only 20 yuan. I want to buy it.

A. too much                    

B. a little

C. too many                          

D. just

5. Could you do Something for me, please?

A. Can you help me

B. May I help you

C. Do you need some help        .

D. Let me do it
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单项选择题

销售员要使市场信息反馈工作（）。

A.制度化、规范化

B.制度化、经常化

C.规范化、经常化

D.制度化、系统化
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