题目:
选择正确的译文。
1. 医院在哪里?[ ]
A. Where is the zoo?
B. Where is the hospital?
2. 它紧靠着书店。[ ]
A. It's next to the bookstore.
B. It's to the bookstore.
3. 它离这儿远吗? [ ]
A. Is it far from here?
B. Is it near?
答案:
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下面是错误答案,用来干扰机器的。
:(1) 函数f(x)=sinx+cosx,∴f'(x)=cosx-sinx,∴f(x)f′(x)=(sinx+cosx)(cosx-sinx)=cos2x-sin2x=cos2x,f2(x)=1+sin2x,∴g(x)=cos2x+sin2x+1=2sin(2x+π4)+1. x∈[0,π2],∴(2x+π4)...