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问题 单项选择题

要将混合物几乎完全分离必须怎样做？（）

A.仅进行一次部分汽化和冷凝的过程

B.进行多次部分汽化过程

C.进行多次部分汽化和部分冷凝的过程

D.都不是

答案

参考答案：C

填空题
从方框中选词，并用其
        there be, have got, some, friend, photo
Dear Jenny,
        Thank you for your last email. How is everything in China? How many students 1. _____ in your class? Have
you got    2._____ new friends? I 3. _____ a new teacher-Mr Green. His daughter and son are my good 4. _____ .
Do you like China? Do you like your school? Please send(发送)an email to me and send me some 5. _____ of your
school. Thanks.
                                                                                                                                                                                       Yours, 
                                                                                                                                                                                        Bill
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单项选择题

菊花的药用部位是（）。

A．干燥柱头

B．干燥花蕾

C．未开放的花序

D．干燥头状花序

E．干燥花
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