2000—2009年国际旅游收支情况 单位：亿美元

下列说法中正确的是（）。

A．2005年，中等收入国家国际旅游支出约占世界的18%

B．2000—2009年，中国香港国际旅游收入变化呈现先缓后急的走势

C．与经济发展水平相适应，发达国家的国际旅游支出和收入都比发展中国家高

D．2000—2009年，美国的国际旅游支出和国际旅游收入在各个国家中都是最高的

Surveys indicate that 52 percent of all women aged eighteen to sixty-five are in the labor force (employed outside the home) in any given month. On the basis of these surveys, a market researcher concluded that 48 percent of all women aged eighteen to sixty-five are full-time homemakers year-round.
Which of the following, if true, would most seriously weaken the researcher’s conclusion

A．More women are in the labor force today than during any other period since the Second World War.

B．Many workers, both men and women, enter and exit the labor force frequently.

C．Although only a small sample of the total population is surveyed each month, these samples have been found to be a reliable indicator of total monthly employment.

D．Surveys show that more women than ever before consider having a rewarding job an important priority.

E．(E) Women who are in the labor force have more discretionary income available to them than do women who are not.