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My son loves video games very much. He spends hours every day playing video games in his room. Is there any redeeming (补偿的)educational value to video games? Some seem like they could help him learn strategy. But I worry others may be too violent or numb (使麻木)his mind. Cecilia Some games may improve kids’ hand-eye coordination and problem-solving skills. Games that require kids to actually move or manipulate (操纵)the game through their own physical movement can even get sedentary kids moving, though not as much as they could if they actually played outside or participated in sports or other outdoor acuities. Others, though, don’t have such benefits, and violent video games have been shown that they might increase kid’s aggressive behavior. Like a lot of aspects of raising kids, when it comes to video games, the healthiest approach is actually self-control. The American academy of Pediatrics(AAP) recommends that kids should spend no more than 2 hours each day on screen time, including watching TV or movies, or playing computer or video games. So consider setting limits at least that strict to keep game playing from affecting their schoolwork, household responsibilities, and the physical activity your son needs very day. Make sure that he’s playing games which are suitable for his age group. All video games are rated and labeled by the Entertainment Software Rating Board. Steer clear of(避开)any rated “M” for mature. Those are for ages 17 and older and can contain heavy-duty violence, strong language, and sexual content. Try to keep the video game console (游戏机控制板)in a common area of the house, not your son’s room. That way you can catch any inappropriate content in the games he’s playing, and he’ll be in a position to interact with others in the house while he’s playing. Make sure your son has appealing alternatives, too, such as sports, activities, opportunities to socialize with peers; and downtime to be creative. If you continue to have concerns about his video game activity, talk with your doctor. Reviewed by:Mary L. Gavin, MD 小题1:What is the opinion of Mary L. Gavin about playing video games? A.Whether it’s beneficial or harmful depends on what the video games are. B.It always improves kids’ hand-eye coordination and problem-solving skills. C.It will make kids more violent and increase their aggressive behavior. D.Kids should give it up and put their hearts fully into their schoolwork. 小题2:The underlined word “sedentary” in the first paragraph of the answer letter is the nearest in meaning to “______”. A.unhealthy B.lively C.bright D.inactive 小题3:According to Mary L. Gavin, which of the following is encouraged to do by parents? A.Keep the video game console out of their house. B.Allow their children to play only such video games as rated “M” C.Let kids play video games as much as possible if it doesn’t affect their lessons. D.Help their children develop other healthy hobbies such as sports and painting. 小题4:Which is the best title of this passage? A.Should children play video games? B.Kids’ playing video games is harmful. C.Is playing video games good for kids? D.Help children choose video games.
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【简答题】配合是指基本尺寸( )并且相互结合的孔和轴( )之间的关系。根据孔和轴公差带之间的不同关系,配合可分为( )、( )和( )三大类。
【单选题】U ab 表示 a 端的电位高于 b 端的电位,若 U ab = -5V ,则这两点中电位高的为(   )。
A.
a点
B.
b点
C.
电位一样高
D.
不能确定
【简答题】n. 种 , 品种 v. 繁殖 , 产仔
【判断题】斯金纳是极端的环境论者,他片面的把行为的原因归结为外部条件,否定了内因的重要性。
A.
正确
B.
错误
【简答题】根据孔和轴公差带之间的不同关系,配合可分为 ( ) 、 ( ) 和( )三大类。
【单选题】呼吸衰竭患者使用呼吸兴奋剂的指征是
A.
呼吸深快
B.
抽搐
C.
烦躁不安
D.
痰液黏稠不易咳出
E.
呼吸道通畅而呼吸表浅
【单选题】呼吸衰竭患者使用呼吸兴奋剂的指征是( )
A.
呼吸深快
B.
抽搐
C.
烦躁不安
D.
痰液粘稠不易咳出
E.
呼吸道通畅而呼吸表浅
【判断题】U ab 一定表示a端的电位高于b端的电位( )
A.
正确
B.
错误
【单选题】配合是指( )的孔和轴公差带之间的关系,并根据其位置关系不同分为间隙配合、过盈配合和过渡配合三大类。
A.
上极限尺寸相等
B.
下极限尺寸相等
C.
实际尺寸相同
D.
公称尺寸相同,互相结合的
【简答题】当孔与轴配合时,根据孔、轴公差带之间的不同关系,配合可以分为 配合、 配合和 配合。
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