【简答题】阅读以下文章,选择最佳答案填空。 Since the terrorist attacks on the United States in September, Americans have given millions of dollars to help thousands of victims and their families. A lot of that money was given ...
【单选题】Can Buildings Be Designed to Resist Terrorist Attack In the aftermath of the terrorist attack on the World Trade Center, structural engineers are trying hard to solve a question that a month ago would...
A.
that was asked by structural engineers a month ago.
B.
that is too difficult for structural engineers to answer even now.
C.
that was never thought of before the terrorist attack.