_______型柴油机活塞顶部烧蚀不太严重时，可采用将活塞安装位置转动90°的方法，使之继续使用
A. Sulzer
B&W
C. MAN
D. UEC
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如果个人和企业持有的现金为8 000亿美元，旅行支票为100亿，个人和企业的支票存款为7 000亿，储蓄存款为40 000亿，小额定期存款为10 000亿，货币市场资金和其他存款为8 000亿，那么M1等于多少亿美元？________。
A. 73 100
B. 58 000
C. 25 100
D. 15 100
E. 7 100
Which information is not given in the text？
A. Ship recycling contributes to sustainable development
B. The IMO believes that making an international instrument to regulate the ship recycling process is urgently in need
C. An international convention on ship recycling has been adopted
D. The IMO has taken action to develop an effective solution to the problem of ship recycling
The expansion valve used in a refrigeration system regulates the
A. superheat of the gas leaving the compressor
B. back pressure in the evaporator
C. temperature in the refrigerated space
D. degree of superheat of the gas leaving the evaporator
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