题目

(本小题满分12分) 已知. (Ⅰ)求的值; (Ⅱ)求的值. 答案:(Ⅰ) (Ⅱ) 解析:(Ⅰ)因为,所以,于是(Ⅱ)因为,故 所以 ---What should we take when going birdwatching?---We should take a pair of binoculars ____________the birds clearly.A. see B. seeing C. to see D. sees
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