No objections _________ at the time. [ ]_爱下问搜题

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问题选择题

No objections _________ at the time. [ ]

A. raised

B. were raised

C. had

D. took

答案

答案：B

解答题

已知函数y=f（x）的定义域为R，且f（-x）=-f（x），当x∈（0，1）时，f(x)=

．
（1）求f（x）在（-1，0）上的解析式；（2）求证：f（x）在（0，1）上是减函数．

单项选择题

( )泄漏后，可用漂白粉加5倍水浸湿污染处，然后再用水冲净。

A．甲醛

B．砷

C．溴

D．氰化钠