生长发育鉴定一般在().
A.晚上
B.早上
C.中午
D.下午
E.都可以
参考答案:B
Tom,together with Mary and Alice,______swim this afternoon.
A.is going to
B.are going to
C.was going to
D.were going to
A2.25M0.5N是()电极系。
A、倒装梯度
B、正装梯度
C、倒装电位
D、正装电位