W: That’s all right, Mr. Davis. She doesn’t have another appointment schedule until 10 o’clock.
Q: When will Mr. Davis most probably meet Mrs. Jones?
(15)
A.Before 9 o'clock.
B.At 10 o'clock.
C.At about 9:15.
D.After 9:50.
第6题
巷道断面上各点风速是________。
A.轴心部位小,周壁大;
B.上部大,下部小;
C.一样大;
D.轴心大,周壁小;
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