目前各厂通常使用的电解制氢设备有两种型号,()和()。
参考答案:DQ—4型;ZHDQ—32/10型
—Do you regret paying twenty dollars for the dictionary?
—No.I ____ twice as much for it.
A.gladly paid
B.should gladly pay
C.would gladly have paid
D.had gladly paid
科学发展观是()提出的。
A.江 * *
B.胡 * *
C.朱 * *
D.温 * *