Vessels transiting the Canal must have their gangways and derricks ________
A. readjusted
B. removed
C. lowered
D. rigged in
查看答案
An automobile sling is used for ________
A. lifting aircraft and helicopters
B. lifting any kinds of cargo
C. lifting the heavy boxes
D. lifting cars and trucks
Must we work on night shift today？ No, you ________
A. need
B. needn’t
C. mustn’t
D. shouldn’t
Timber can be stowed ________
A. both on deck and in holds
B. only on deck
C. only in holds
D. either on deck or in holds
“ Keep ________ to the beacon,” said the pilot
A. line
B. direction
C. back
D. straight
微信支付 
支付宝支付