题目内容

【题目】北京时间20164281540分,临川二中正在进行期中考试。依据所学知识回答下列各题。

1

A. 2016428940B. 2016428740

C. 20164272340D. 2016428540

2

A. 5/21 B. 3/29 C. 13/72 D. 7/75

【答案】

1B

2C

【解析】试题分析:

1】该题考查时间的计算,北京时间为东八区,时间为4281540分;求国际标准时间(0时区)的时间,根据区时的计算方法,东八区与0时区相差8小时,0时区在东八区的西边,时间应该减,因此4281540-8小时=428740分,答案选B项。

2】该题主要考查日期界限,全球来讲,经度越靠东时间越早,东12区时间最早的时区,根据东八区时间为20164281540分,求得东12时区的区时为20164281940分,所以全球最早的时间为20164281940分,说明现在进入28日的时间有1940分;那么还有4小时20分钟的时间在27日,因此用4小时20分除以24,就得出27日占全球的72分之13.答案选C项。


人为日界线

自然日界线

界线

原则上规定1800经线为日界线,但实际的日界线是曲折的,在地球表面是固定不变的

不固定,可以是任何一条经线

钟点

钟点不固定,从0—24

钟点固定,0点(或24点)

日期

日界线的东侧,为旧的一天,日界线的西侧,为新的一天

日界线的东侧为新的一天,日界线的西侧为旧的一天

观测角度

全球

局地

观测对象

时区图

光照图

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相关题目

【题目】根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

As is known to all, nothing is more important than health. There is an English saying, “Laughter is the best medicine.” It shows laughter is one of the most important factors that contribute to health. 1 Now, however, doctors have begun to investigate laughter and the effects it has on the human body. They have found that laughter is really good to people’s health.

__2__They wanted to study the effects of laughter on the body. People watched funny films while doctors checked their heart rate, blood pressure, breathing and muscles. __3___ It increases blood pressure, the heart beating and breathing; it also works several groups of muscles in the face, the stomach, and even the feet.

Other tests have shown the function of laughter. They have drawn a conclusion that laughter appears to be able to reduce the effects of pain on the body. In one test doctors produced pain in groups of students who listened to different radio programs. The group that tolerated pain for the longest time was the one that listened to a funny program. _ 4___Scientists explained laughter helps to produce something that can reduce both stress and pain.

As a result of these discoveries, some doctors open laughter clinics .__ 5__ What’s more, doctors have found that even if their patients do not really feel like laughing ,making them smile is enough to produce beneficial effects. Also, these effects are similar to those caused by laughter.

A. What resultedspan> in such a result?

B. Doctors carried out some tests.

C. The more you laugh, the healthier you are .

D. Until recently, few people took the saying seriously.

E. Laughter is reported to be a good medicine to the patient.

F. It was found that laughter has similar effects to physical exercise.

G. They help to improve their patients’ health by encouraging them to laugh

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