某些不锈钢中含较高的（）是为了提高不锈钢的易切削性能。
A、Ni
B、S
C、Mn
参考答案：B
When asked about their opinions about the schoolmaster, many teachers would prefer to see
him step aside ____ younger men. [ ]
A. in terms of
B. in need of
C. in favor of
D. in praise of
幼儿少尿是（）。
A．400ml/天～600ml/天
B．600ml/天～800ml/天
C．＜400ml/天
D．＜200ml/天
E．＜30ml/天～50ml/天
