特发性脊柱侧凸患者,进入骨发育成熟期后,仍应在最初2年内每日佩戴矫形器()
A. 1~2小时
B. 3~5小时
C. 12~20小时
D. 22~23小时
E. 24小时
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In tanker trade,the signing by master the documents relating to the use of jetties and berths ()the shipowners thereby to pay for any damage caused to the jetties or berths by the vessel’s using them.
A. ties
B. binds
C. does
D. ha
“Enter”键又称()。
A. 回车键
B. 空格键
C. 删除键
D. 退格键