就直线轨距而言,规定不是标准轨距是()
A、1431mm
B、1433mm
C、1435mm
参考答案:A, B
We are sure that () to do this face to face, he would find it difficult to express himself without losing his temper.
A. were he to try
B. would he try
C. was he trying
D. if he tries
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