环己烷的分子式是（）A、C6H6 B、C6H12 C、C6H11OH D、C6H10O_爱下问搜题

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问题单项选择题

环己烷的分子式是（）

A、C₆H₆

B、C₆H₁₂

C、C₆H_11OH

D、C₆H_10O

答案

参考答案：B

填空题

选择适当的词组并用其适当的形式填空，每个词组只能使用一次。

download music at the weekend go online send emails make plans

1. My brother likes music and he often_____ from the Internet.
2. Tom often ______ and talks with his friends.
3. I usually go to the zoo with my parents ______ .
4. Please ______ to me.
5. Would you like to ______ for our travel this weekend?

填空题

通常完整的电子邮件地址由两部分构成，第一部分为信箱名，第二部分为( )。