_____ you _____ he can go to watch the m

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问题选择题

_____ you _____ he can go to watch the movie, because one of you must help me do the housework. [ ]

A. Both; and

B. Too; to

C. Neither; nor

D. Either; or

答案

答案：D

选择题

--- The weather isn’t good enough for an outing, is it?

---Not in the least. We can’t have ______ at this time of the year.[ ]

A. a worse day

B. a nice day

C. such bad a day

D. so fine day

填空题案例分析题

我国西部资源开采过度，草原植被遭到破坏，生物多样性锐减，由此引起生态环境恶化。现在，保护生态环境，实现可持续发展，已经成为西部开发中面临的最紧迫、最艰巨的任务。图6示一个草原生态系统的营养结构，请据图回答问题。

在草→鼠→鹰这条食物链上，能量传递效率按10％计算，则消耗草5600克，鹰得到（）能量。