题目内容

Is ______Qinghai-Tibet Railway plays an important role in China’s railway history the topic that you are coming to?

A. what
B. it
C. this
D. that

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Stage fright is a common example of _______educators call a “lack of confidence” among students.

A. that
B. what
C. which
D. whose

圆轴扭转时,横截面上的内力是扭矩。( )

A. 对
B. 错

矩形截面杆件扭转时横截面不再为平面。( )

A. 对
B. 错

How many passengers were on board Asiana Flight 214 when it crashed on landing San Francisco Airport?

A. 307
B. 180
C. 214
D. Not mentioned