采用热装法装配轴承时，将轴承放入机油槽中加热，温度不超过（）℃为宜
A.200
B.150
C.100
D.50
参考答案：C
Each member country of WTO must ________ its laws and regulations and compete on the principle of fairness and cooperation.
A．submit to
B．cater to
C．correspond to
D．relate to
心尖区舒张期杂音考虑的疾病是（）。
A.主动脉狭窄
B.肺动脉狭窄
C.动脉导管未闭
D.二尖瓣狭窄
E.室间隔缺损
