问题 选择题

3月21日6时整,甲地(40°N,45°E)正好日出。此时一艘轮船航行于太平洋上。经过10分钟后,该轮船越过了日界线,这时轮船所在地的区时可能是

A.3月21日14时50分

B.3月21日15时10分

C.3月22日15时10分

D.3月22日14时50分

答案

答案:B

本题考查日界线问题。3月21日,轮船越过日界线,说明有两种可能,一种情况是自西向东越过日界线,则日期应为3月20日,另一种情况是自东向西越过日界线,则日期应为3月21日(此时日界线以东为20日),甲地45°E位于东3区,与日界线所在的东西12区相差9小时,又轮船航行10分钟,跨2.5个经度。范围在180°左右,所以轮船所在地的区时为东西十二区的区时(180°)的时间,所以应为15时10分。而选项中没自西向东航行的日期(20日),所以轮船是自东向西航行且越过日界线,故B项正确。

阅读理解

While parents, particularly mothers, have always been attached to their infants (婴儿), societal conditions frequently made this attachment difficult to maintain (保持). First of all, the high infant death rate in the premodern times meant that such attachments often ended in hopelessness. Perhaps to prevent the sadness that infant death caused, a number of societal practices developed which worked against early attachment of mother and child.

One of these premodern attachment-discouraging practices was to leave infants unnamed until they had survived into the second year. Another practice that discouraged maternal (母亲的) attachment was tightly wrapping (包裹) infants. Wrapping effectively prevented the close physical interactions like stroking (抚摸) and kissing that are so much a part of modern mothers' and fathers' affection for their infants.

A third practice which had the same distancing effect was wet-nursing. Breast-feeding (母乳哺育) was not popular among the well-to-do in the early modern times; infants were often fed by wet nurses hired for the purpose. In some places, such as nineteenth-century France, city infants were sent to wet nurses in the country. Often a wet nurse would feed her own child first, leaving little milk for the city infant—who, in many cases, died. In Rouen, the death rate for children sent to a wet nurse was 35 percent.

68. Babies were unnamed until they were two so that _______.

A. an old social custom could be kept up        B. maternal attachment could be maintained

C. they could have better chances to survive   D. their parents would not be too sad if they died

69. Why were babies wrapped?

A. To protect them from the cold.          B. To distance their mothers from them.

C. To make them feel more comfortable. D. To make it easy for their mothers to hold them.

70. Wet nurses were women who________.

A. babysat city infants                           B. fed babies of other families

C. sent their babies to the country           D. failed to look after their babies

71. Which is the best title for the passage?

A. Societal Conditions in Premodern Times

B. Practices of Reducing Maternal Attachment

C. Poor Health Service and High Infant Death Rate

D. Differences between Modem and Premodern Parents

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