生物圈Ⅱ号实验的失败给你什么启示？ [ ] A．说明人类的科_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题选择题

生物圈Ⅱ号实验的失败给你什么启示？ [ ]

A．说明人类的科学还不够发达

B．生物圈是人类和其他生物共同生活的唯一家园

C．人类可以离开生物圈

D．科学实验总会有失败的

答案

答案：B

选择题

—He is an outstanding violinist, isn't he?

— . [ ]

A. Sure is he

B. He sure is

C. He is sure

选择题

The chairman asked me to __________ the report, because he didn’t want to speak for too long at this meeting.

A． cut off

B．cut away

C．cut out

D．cut down