特大型危险化学品企业的风险抵押金存储不低于人民币（）万元。
A.100
B.150
C.200
D.250
参考答案：C
He told me ___ too much in class any more. [ ]
A. didn't talk
B. not talk
C. not to talk
D. to not talk
天线下倾角取值与（）直接相关。
A.天线高度
B.覆盖半径
C.天线垂直波瓣
D.电子下倾角参数
