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问题 单项选择题

飞行中遇到严重威胁航空器和机上人员生命安全的情况时，空勤组应当按规定发出遇险信号如“SOS”，装有应答机的航空器，应将其置于（）.

A.A7500

B.A7600

C.A7700

答案

参考答案：C

单项选择题

The Census Bureau reported that the median family income, after adjustment for inflation, increased 1.6 percent in 1983. Poverty normally declines when family income goes up, but the national poverty rate remained at its highest level in eighteen years in 1983. The Census Bureau offered two possible explanations: the lingering effects of the deep and lengthy 1981-1982 recession, and increases in the number of people living in families headed by women and in the number of adults not living with any relatives. Both groups are likely to be poorer than the population as a whole.
Which of the following conclusions can be properly drawn from this report

A．The national poverty rate has increased steadily over the last eighteen years.

B．The national poverty rate will increase when there are lingering effects of an earlier recession.

C．The median family income can increase even though the family income of some subgroups within the population declines or fails to increase.

D．The category of adults not living with any relatives is the most critical group in the determination of whether the economy has improved.

E．(E) The median family income is affected more by changes in family patterns than by the extent of expansion or recession of the national economy.
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单项选择题

下列哪一项不属于体育课的课中常规？（）

A.上课仪式

B.课中的要求

C.课的结束

D.器材的整理和归还
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