One of the disadvantages of using carbon dioxide to extinguish a fire in an enclosed space
A. the 'snow' which is sometimes discharged along with the gas is toxic
B. prolonged exposure to high concentrations of CO2 gas causes suffocation
C. rapid dissipation of the CO2 vapor
D. the CO2 gas is lighter than air and a large amount is required to extinguish a fire near the deck
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下面哪一项仅包括银行的资产？ ________。
A. 现金资产、银行间贷款、有价证券和贷款
B. 准备金、储蓄存款、有价证券和贷款
C. 准备金、债券、有价证券和储蓄存款
D. 有价证券、准备金、债务和银行间现金
E. 准备金、支票存款、有价证券和贷款
The fire drill must, as far as practicable, be conducted as if______.
A. there is a minor emergency
B. there is an actual emergency
C. there were a minor emergency
D. there were an actual emergency
Positive displacement, helical gear pumps are well suited for pumping oil because
A. stuffing boxes eliminate the leakage problems usually associated with other gear pumps
B. it is not necessary to closely maintain design clearances with this pump
C. they are essentially self-priming and produce a high suction lift
D. these pumps are designed with extreme tooth angles
信用卡、借记卡和电子支票________。
A. 都是货币
B. 不是货币
C. 有时候是货币，取决于他们如何被使用
D. 有时候是货币，取决于他们购买什么东西
E. 有时候是货币，取决于不同的货币测定指标
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