答案:D
--- Mum, could I play with my classmates for a while after I finish my homework?
--- _______. But you must come back before supper.
A.Yes, you can
B.Yes, you could
C.No, you can’t
D.No, you couldn’t
用缆注意事项中,下述不正确的是()
A.吹开风大时,首、尾缆与码头夹角应大一些
B.顶流强时,首、尾缆与码头夹角应大一些
C.系浮筒时,要求各缆受力均匀,但回头缆不宜吃力
D.吹开风强时,一般先带着横缆,并尽快收紧