Lubrication for the main reduction gears used with diesel engines is usually supplied by
A. oil from the main engine sump
B. an independent lube oil system
C. the stern bearing head tank
D. the stem bearing sump tank
_______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
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