题目内容

I didn’t answer the phone________ I didn’t hear it ring.

A. unless
B. if
C. otherwise
D. because

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We’re going to________ the task that we haven’t finished.

A. keep up
B. carry on
C. take away
D. set up

The general manager sat there, ________to the report from each department.

A. listen
B. to listen
C. was listened
D. listening

Because light travels (fast) ________than sound, lighting is seen before thunder (雷) is heard.

截面设计时，满足下列条件（）则为第二类T形截面。

A. fyAs ≤fcm b'f h'f
B. M ≤fcm b'f h'f(ho-h'f /2)
C. fyAs >fcm b'f h'f
D. M >fcm b'f h'f(ho-h'f /2)