0301-17

daoying

17. Titanium has the strength of steel but weighs half only as much, hence its advantage

A B C

for use in aircraft. 答案是D， 可是C好象也有问题，half only 还是 only half 呢？

D

笑月

D少了谓语 is

应该是 is in aircraft

leadership

b --> only half

aircraft不可数名词，对的。

但是感觉hence后面的结构不完整。