已知θ∈​$(\frac{\mathrm{\pi }}{4},\frac{\mathrm{\pi }}{2})$，在单位圆中角θ的正弦线、余弦线、正切线分别是a、b、c，则它们的大小关系是(　　)

根据句意及汉语提示填空。
____ We can't ____ ____ ____（习惯）the weather here because the wind is always strong.
____ I'll help you, ____ ____（即使）I don't sleep for a night.
____ I would like more time to _____ this problem _____ (仔细考虑).
____ You can ____ us ____ (打电话给……) when you get to Shanghai. We will meet you.
____ At the age of 5, my father ______ _____ _____ (对……感到满意) my good results at school.

已知函数f（x）=ln（$\sqrt{1+9x^2}$﹣3x）+1，则f（lg2）+f（lg$\frac{1}{2}$）=（　　）

影响了苏联一代革命青年的成长的作品是(   )

下列生物的生活方式属于寄生的是（ ）