()of the following need not be entered in the official logbook?
A. The testing of the internal combustion engine driven emergency generator at least once each month the vessel is navigated
B. The testing of storage betteries for emergency lighting and systems once each 6 months the vessels is navigated
C. The actual draft when the vessel arrives in salt water after department a port
D. The testing of the line-throwing appliance once every 3 month
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根据《供电营业规则》,下列选项中正确的是()。
A. 因建设引起建筑物、构筑物与供电设施相互妨碍,需要迁移供电设施或采取防护措施时,应按建设先后的原则,确定其担负的责任
B. 如供电设施建设在先,建筑物、构筑物建设在后,由后续建设单位负担供电设施迁移、防护所需的费用
C. 如建筑物、构筑物的建设在先,供电设施建设在后,由供电设施建设单位负担建筑物、构筑物的迁移所需的费用
D. 不能确定建设的先后者,由双方协商解决
神经肌肉接头后膜的N2胆碱受体被阻断多少时,肌颤搐才完全抑制()
A. 75%
B. 80%
C. 85%
D. 90%
E. 95%