压强的国际单位是( )。A．bar B．kgf/m2 C．mmHg D．N/m2

______ get older, the games they play become increasingly complex.

A．Children

B．Children, when they

C．As children

D．For children to

积极型股票投资管理的目标是获得利益最大化。（）

He always did well at school________having to do part－time jobs every now and then. [ ]

A. in spite of  

B. regardless of

C. on account of  

D. in case of

保温试验是检查成品杀菌效果的手段，肉禽水产品罐头应在37％左右保温多少天？（）

A.4

B.5

C.6

D.7

E.8