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單項(xiàng)選擇題

To develop maximum anchor holding power，the optimum angle between the anchor’s shank and the mooring lines is（）.

A.0 degrees
B.10 degrees
C.20 degrees
D.30 degrees

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單項(xiàng)選擇題

There is something wrong with our radar．All kinds of objects can’t be clearly（）within the definite range.

A.shown
B.expressed
C.appeared
D.displayed

單項(xiàng)選擇題

There is plenty of（）at this area.

A.a room
B.room
C.rooms
D.the room

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