题目内容

乙醇和甲醚属于

A. 碳架异构
B. 位置异构
C. 官能团异构
D. 互变异构

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简述《一问黄河源》的艺术手法。

During the ______ days guest can look out and see the entire earth withtheir own eyes.

A. third
B. three
C. threes
D. thirds

According to the passage, when the pod is in orbit 460 kms above theearth, the guest is going to travel around the earth ______.

A. each 80 minute
B. each 80minutes’
C. every 80minutes’
D. every 80 minutes

______ have shown interesting the space vacation.

A. More 200 people
B. 200 people more than
C. More than 200 peoples
D. More than 200 people