In the United States and several other c

题型:阅读理解

问题:

In the United States and several other countries, 2.5 million children play baseball in an organization called Little League. They play on teams in their hometowns. Their parents and other adults in the community coach or instruct them and serve as umpires to make sure that everyone follows the rules. Local businesses give money for the ball fields and the uniforms. Local teams compete against each other and the winners get to play teams that are more distant. Eventually, the top teams go to the Little League World Series.

One hundred years after Abner Doubleday invented baseball in Cooperstown, New York, in 1839, Little League got started in Pennsylvania. Three men started the game for neighborhood boys with a smaller playing field and fewer innings than adult baseball. Little League became popular after World War II when the game spread across the United States. By 1955 it was played throughout North America and within five years it had spread to Europe. Children’s baseball really caught on in Japan and Taiwan of China and teams from those areas won the World Series seven out of eight years. After this, the organization tried banning foreign teams from the World Series, but the ban came to an end after one year.

At first, Little League was only for boys aged nine to twelve. However, in 1974, the parents of girl baseball players brought a law suit. The courts ruled that Little League had to include both boys and girls. Later Little League added on softball and other games for teenagers up to age eighteen. Occasionally a Little Leaguer becomes a professional player. For example, Gary Carter went from Little League to play nineteen seasons in the Major Leagues, ten of them as an All-Star player. But, by and large, youngsters play baseball for fun and because their parents are proud of them.

小题1:The mothers and fathers of Little League players ______.

A.help run the games

B.travel in coaches

C.give the teams money

D.play in the World Series小题2:In what year was Little League established?

A.1839

B.1939

C.1955

D.1960小题3:Why do most players take part in Little League?

A.To play in the Major League.

B.To have fun and please their parents.

C.They expect a profit from All-Star games

D.They want to learn how to serve as umpires.小题4:What is true about players today?

A.Little League is only for neighbourhood boys.

B.Girl players have to buy their suits.

C.Girls and boys can participate to age eighteen.

D.Children can only play until age twelve.

考点:日常生活类阅读
题型:阅读理解

小明在学习金属活动性顺序时,对课本上“活动性较强的金属一般可以将位于其后面的金属从它们的盐溶液中置换出来”这句话产生了好奇。为什么用“一般”这个词呢?难道还有例外吗?于是他就对金属钠与硫酸铜溶液的反应展开探究。

[猜想与假设] 第一种:钠与硫酸铜反应生成铜单质; 第二种:钠与硫酸铜反应没有铜单质生成。

[查阅资料] 金属钠性质活泼,常温下能与氧气反应,也可以与水反应放出氢气。实验室中,金属钠保存在煤油中。

[实验过程与现象]

实验1:用镊子从煤油中取出一块金属钠,放在滤纸上,用小刀切下一小块进行观察,发现切面具有银白色光泽,在空气中放置片刻,银白色逐渐变成暗灰色。将其投入烧杯中的蒸馏水里,发现钠块浮在水面,立刻熔化成闪亮的小球,在水面上游动,并发出“嘶嘶”的响声,同时有气体产生。在反应后的溶液中滴入1-2滴酚酞试液,试液立即变为红色;

实验2:在盛有硫酸铜溶液的烧杯中,投入一小块金属钠钠,发现也有气体产生,同时生成蓝色沉淀,但没有红色物质析出。 请根据以上实验现象回答下列问题:

(1)简述金属钠的物理性质:_______________。

(2)分步写出钠与硫酸铜溶液反应的化学方程式: ①_____________ ;②_____________ 。

[实验结论] 活动性较强的金属不一定能位于其后面的金属从它们的盐溶液中置换出来。

[反思与评价] 排在金属活动性顺序表前面的金属(K、Ca、Na)在与盐溶液反应时,先跟溶液中的__________反应,生成的碱再跟盐反应。所以它们________(填“能”或“不能”)置换出盐溶液中的金属。

题型:阅读理解

临床诊断为脑震荡病人,可存在有()

A.有逆行性遗忘,昏迷时间常大于30分钟

B.神经系统检查一定有病理反射

C.脑脊液常规、生化有异常

D.CT检查可有阳性表现

E.脑干听觉诱发电位可有异常

题型:阅读理解

南水北调工程沿线地区的叙述,不正确的是(  )

A.经过华北平原、长江中下游平原

B.三次穿过黄河

C.一次穿过长江

D.该工程能缓解西部地区的能源短缺问题,可带动沿线地区经济发展

题型:阅读理解

子宫内膜增生症

题型:阅读理解

通过手机银行基金投资功能,客户可以查询各个基金的实时行情,方便快捷地完成各类基金交易。

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