如果联邦储备券和硬币是7 650亿美元，银行在美联储的准备金是80亿美元。黄金存量是110亿美元，同时美联储拥有的政府债券为7 250亿美元，货币基础等于多少？________。
A. 7 650亿美元
B. 7730亿美元
C. 7760亿美元
D. 7 440亿美元
E. 15 090亿美元
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According to this passage, if the cylinder non-return valve were not leaky
A. an explosion would not be caused
B. there still would be a danger of explosion
C. oil would not deposit in the air pipe
D. pipe lines would not have to be drained
Cold weather starting of a diesel engine is more difficult than warm weather starting due
A. use of low viscosity oil in cold weather
B. increased moisture content of inlet air in cold weather
C. increased drag of pistons and bearings due to increased oil viscosity
D. higher compression pressures reached due to smaller clearances existing in the engine during cold weather
When using a fuel with a higher than normal sulfur content in an auxiliary four stroke diesel engine, you may
A. maintain higher than normal jacket water temperature
B. change the lube oil more frequently than normal
C. maintain a higher air-box temperature than normal
D. maintain a higher air-box pressure than normal
管理美国货币的数量是哪个机构最重要的责任？________。
A. 美国国务院
B. 美国州政府
C. 美国财政部
D. 美国联邦储备
E. 美国造币厂
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