对动物致病的细菌大多是（）
A.专性厌氧菌
B.专性需氧菌
C.微需氧菌
D.兼性厌氧菌
E.以上都不是
参考答案：D
It suddenly occurred to Anne that money couldn't ____ all that Bob had suffered in the past five years.
A．look up to
B．put up with
C．fit in with
D．make up for
反映均数抽样误差大小的指标是（）
A.标准误
B.标准差
C.变异系数
D.均数
E.全距
