我国股票基金大部分按照（）的比例计提基金管理费。
A．10％
B．5％
C．1．5％
D．O．25％
参考答案：C
—I phoned you at 7:00 this morning. But there was no answer.
—Well, maybe I ____________morning exercises at that time. [ ]
A. was doing
B. did
C. is doing
D. would do
机房设计时应采取机组消声及机房隔声综合治理措施，治理后环境噪声，一般商业与居民混合区不宜超过( )。
A．昼间55dB，夜间45dB
B．昼问65dB，夜间55dB
C．昼间45dB，夜间40dB
D．昼间30dB，夜间20dB
