溶解氧标准常温下使用期限为().
A、一周;
B、一年;
C、2个月;
D、一天.
参考答案:A
— I ______ the chance to apply for the new post. What do you think?
— I think you should go for it. We’ll all back you up.
A.have given
B.am given
C.have been given
D.was given
目前有()等多种基础形式应用于风力机组的实际工程中.
A.桩基础
B.重力型基础
C.板梁结构基础
D.PH无张力灌注桩基础