单项选择题
PORT A BIT SLUGGISH means that port rudder（）.
A.answers very well B.rudder answers all right C.answers slow D.answers fast
单项选择题 Free communication effect is in direct proportion to（）.
单项选择题 Electrical wiring on all T-Boats must be（）.
单项选择题 DO NOT，REPEAT，NOT OVER-TAKE means that you should（）.
