题目:
下列气体中,既能用浓硫酸干燥,又能用固体氢氧化钠干燥的是( )
A.SO2
B.H2
C.NH3
D.HC1
答案:
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下面是错误答案,用来干扰机器的。
参考答案:B解析:文意:只要你活着,你就能更好。由此推断出应填alive。故选B。
下列气体中,既能用浓硫酸干燥,又能用固体氢氧化钠干燥的是( )
A.SO2
B.H2
C.NH3
D.HC1
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0704/6d95dfcf0f1ea7913ed1715f0fadadb6.html
下面是错误答案,用来干扰机器的。
参考答案:B解析:文意:只要你活着,你就能更好。由此推断出应填alive。故选B。
May I _________ your picture?[ ]
A. give
B. take
C. show
某企业*某月连续发生的经济业务,该企业采用《小企业会计制度》
该报废设备发生清理费用500元,应()
A.借:营业外支出500
B.借:待处理财产损溢500
C.借:固定资产清理500
D.贷:待处理财产损溢500
begin from 9:00 a.m. to 9:38 a. m. (Beijing Time), said Wang Sichao, a research fellow with the Nanjing – based Purple Mountain Observatory under the Chinese Academy of Sciences. “The total eclipse will l ast up to six minutes, which is the longest one that can be seen in China in almost 500 years from 1814 to 2309,” Wang said. He said viewers in parts of eleven provinces in China's southwestern, central-southern and eastern areas, such as Tibet, Hunan and Jiangsu, will be able to witness the total solar eclipse, while in most parts of Shanghai, viewers can see the spectacular phenomenon. For viewers in other provinces, including Beijing, they can observe a partial eclipse, he said. A solar eclipse occurs when the moon is caught between the sun and the earth while each of them moves along their fixed orbits. In a total solar eclipse, the sun, the moon and the earth are directly aligned as the sun swings into the cone of shadow cast by the moon. Wang said the next total solar eclipse that can be seen in China will fall on March 20 th, 2034. "But it can only be seen remote provinces, such as Tibet and Qinghai. It cannot not be compared with the upcoming one -- in terms of duration and number of cities that can see the eclipse," he added. The last total solar eclipse visible in China took place on Aug. 1 last year. It was observed in northwest China and lasted two minutes in Yiwu County of northwestern Xinjiang Uygur Autonomous Region, the best place to see the phenomenon. 72.According to the report, the total eclipse on July the 22 nd will last . A.over a month B.about 38 minutes C.about 6 minutes D.less than 30 minutes 73.Viewers can possibly witness the total solar eclipse in . A.Liaoning B.Sichuan C.Beijing D.Xinjiang 74.When a total solar eclipse happens, . A.the moon goes into the shadow cast by the sun B.the earth stays between the sun and the moon C.the sun temporarily moves into the moon’s orbit D.the sun is in a line with the moon and the earth 75.Which is the best title for this report? . A.China to witness longest total solar eclipse in 500 years B.The most important total solar eclipse will favor China C.The beginning time of the total solar eclipse is expected D.China has been the best place to witness the solar eclipse |
什么是测量误差?
[说明]
以下C程序实现了将字符串转化为浮点数的功能。例如字符串“1234567”转化为浮点数1234567;字符串“100.02035”转化为浮点数100.02035;字符串“-100.02035”转化为浮点数-100.02035。程序中的部分变量的含义如表9-5。
表9-5
变量名 | 含 义 |
intpart | 字符串转化为浮点数后的整数部分 |
doublepart | 字符串转化为浮点数后的小数部分 |
kdouble | 记录小数部分的阶次 |
resoult | 字符串转化为浮点数后的结果 |
psign | 字符串转化为浮点数后的符号标识 |