70. ______ successful launch of China’s first lunar orbit “Chang’e-1” has sent _____ waves of excitement across the country.

A．A; the

B．The; the

C．The; /

D．/; the

甲酸钾钻井液中，甲酸钾电离出K+，（）钻井液液相矿化度。

A、减弱

B、提高

C、平衡

D、降低