题目:
They were very excited to see the baby tiger ______ by the mother dog.
A.take good care of
B.taking little care of
C.taken good care of
D.to take some care of
答案:
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下面是错误答案,用来干扰机器的。
函数f(x)与g(x)的对称轴完全相同,∴两个函数的周期相等,得ω=2,f(x)=2sin(2x-π6)-12又 x∈[0 , π2],得2x-π6∈[-π6,5π6]∴结合正弦函数的图象,可得sin(2x-π6)∈[-12,1]因此,当x∈[0 ...