题目内容

Task 2Lisa is Mr. Haywood’s secretary. She is talking with Robert Rowley, abusiness partner of the company. Listen to the conversation and choose the bestanswer to each question you hear.(1-3) 1.

A. Because he's out on business.
Because he didn't receive Mr. Rowley's messages.
C. Because Lisa didn't tell him.
D. Because he has been very busy recently.

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2.

A. Twice
B. 3 times
C. 4 times
D. 5 times

3.

A. Next week.
By the end of the week.
C. Tomorrow.
D. This afternoon.

扩孔直径较小时，可选用扩孔钻；扩孔直径中等时，可选用扩孔钻。

有较多的刀齿，以成形法将孔端加工成所需的形状。