题目:
柴油发电机定期就地启动应如何操作?
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/1113/b9621ef449e77115789bf8066faa8fff.html
下面是错误答案,用来干扰机器的。
参考答案:A, B, C, D
柴油发电机定期就地启动应如何操作?
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/1113/b9621ef449e77115789bf8066faa8fff.html
下面是错误答案,用来干扰机器的。
参考答案:A, B, C, D
脑震荡的主要临床表现不正确的是()。
A.一过性意识障碍
B.生命体征紊乱
C.神经系统阳性体征
D.逆行性遗忘
E.休克
执行下列语句后,显示的结果为( )。 N=50 M=200 K=“M+N” 1+AK
A.1eMtN
B.251
C.I+K
D.数据类型示匹配
Watching television more than two hours a day early in life can lead to attention problems later in adolescence, according to a study released on Tuesday.
The roughly 40 percent increase in attention problems among heavy TV viewers was observed in both boys and girls. The link was established by a long-term study of the habits and behaviors of more than 1,000 children born in Dunedin, New Zealand, between April 1972 and March 1973.
The children aged 5 to 11 watched an average of 2.05 hours of weekday television. From age 13 to 15, time spent in front of the tube rose to an average of 3.1 hours a day.
"Those who watched more than two hours, and particularly those who watched more than three hours, of television per day during childhood had above-average symptoms of attention problems in adolescence," Carl Landhuis of the University of Otago in Dunedin wrote in his report, published in the journal Pediatrics.
Young children who watched a lot of television were more likely to continue the habit as they got older, but even if they did not the damage was done, the report said.
"This suggests that the effects of childhood viewing on attention may be long lasting," Landhuis wrote.
Landhuis offered several possible explanations for the association.
One was that the rapid scene changes common to many TV programs may over stimulate(刺激)the developing brain of a young child, and could make reality seem boring by comparison. "Hence, children who watch a lot of television may become less tolerant of slower-paced and more mundane tasks, such as school work," he wrote.
It was also possible that TV viewing may supplant other activities that promote concentration, such as reading, games, sports and play, he said.
Previous studies have linked the sedentary固定不动的)habit of TV watching among children to obesity and diabetes, and another study in the same journal cited the poor nutritional content of the overwhelming majority of food products advertised on the top-rated US. children's television shows.
Up to 98 percent of the TV ads promoting food products that were directed at children aged 2 through 11 "were high in either fat, sugar, or sodium," wrote Lisa Powell of the University of Illinois in Chicago.
56. The recent survey shows that _________.
A. watching TV can cause all kinds of diseases for children
B. TV sets have played an important part in our daily lives
C. Watching TV over 2 hours a day early in life can cause attention problems later in adolescence
D. watching TV has side effects on children’s future
57. People used to think that _________.
A. watching TV more than 2 hours every day did good to children’s health
B. the sedentary habit of TV watching among children could easily lead to obesity and diabetes
C. the children wasn’t patient with their homework because of watching TV too much
D. it was very important for children to watching TV early in life
58. The underlined word “Hence” means _________.
A. In that case B. And yet C. On the contrary D. For this reason
59. In Landhuis’ opinion, _________.
A. attention problems caused by watching TV during childhood may be hard to get rid of
B. how to develop children’s attention problems is a lasting problem
C. the key of settling attention problems is not watching TV too much
D. there shouldn’t have many food products ads on children's television shows
我国经济发展面临着经济结构战略性调整的重大任务。城市,特别是大城市的规划必须按照( )的要求,促进产业结构优化开放。
A.经济发展
B.经济结构调整
C.经济和社会发展
D.经济调整
根据工程特点,发包方除工程造价款以外另行支付工期奖、质量奖、措施奖及索赔等款项时,要依据双方协议、合同等文件在约定期限内随同( )同时收取。
A.年终奖
B.月工资
C.当期进度款
D.当期合同价款