一回1000kV特高压输电线路的自然功率约为500kV常规输电线路(4*LGJ-400型导线)的()倍。
A.4
B.2
C.6
D.8
参考答案:A
抑制胃酸分泌作用最强的是()。
A.西米替丁
B.雷尼替丁
C.奥美拉唑
D.哌仑西平
E.丙谷胺
The man()Mary was so tall that she could hardly see the show.
A.in front of
B.in the front of
C.at the back of
D.at the beginning of