單項選擇題If the sling bumps()the beams,serious accidents may follow.

A.at
B.on
C.into
D.against


您可能感興趣的試卷

你可能感興趣的試題

1.單項選擇題I have()damage below water line.

A.large
B.big
C.important
D.major

3.單項選擇題He must have had an accident,or he()then.

A.would have been here
B.should be here
C.had to be here
D.would be here

5.單項選擇題Fracture damage to the end links of the anchor cable,or to the jews’ harp may be eliminated by().

A.using a small diameter connecting shackle
B.ensuring the swivel is well lubricated and free to turn
C.installing the connecting shackle with the bow towards the anchor
D.securing a piece of wood to the jews' harp