通常经济基本面较差（增长慢而物价高）时，债券投资收益较高。
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In slow speed two-stroke engines,（）the fresh air entering begins when and stops as（）
A. the inlet port is opened by the up coming piston； the port is closed by the down going
B. the inlet valve is opened by the down going piston；the inlet valve is closed
C. the inlet port is opened by the down going piston；the port is closed by the up coming
D. the inlet valve is opened
The area of strong westerly winds occurring between 40°S and 60°S latitude is called the（）.
A. polar easterlies
B. prevailing westerlies
C. roaring forties
D. jet stream
法维莱制动机制动系统故障按照严重程度分为（）、中级故障和次要故障。
行政机关和民主党派机关的工作人员都属于我国公务员范畴。
A. 正确
B. 错误
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