Above-normaltidesnearthecenterofahurricanemaybecausedbythe（）.
A. highbarometricpresure
B. jetstream
C. stormsurge
D. torrentialrains
经批准检修操作的设备经现场操作并在（），现场许可人才能发出工作许可。
A. 工作侧装设操作地线
B. 工作侧拆除操作地线
C. 电话许可
D. 当面许可
Avessel’sbottomwillbesubjectedtotensionwhenweightisconcentrated（）.
A. amidships
B. aft
C. atbothendsofthevesel
D. forward
Avesselmooredwithtwoanchors,sometimes,atanexposedroadsteadto（）.
A. aidturingtheship
B. obtainafinebearing
C. increaseshipswingtowindortide
D. lightenthestressofanchorchains
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