问题 阅读理解

Last weekend, twenty thousand people gathered in the state of Georgia to watch students from twenty-eight countries compete with robots they built. More than ten thousand students and more than five hundred robots took part in the competition.

Almost one thousand and seven hundred high school teams entered a level of competition called LUNACY. The competitors came from eleven countries, including the United States. In January, the organization sent the same supplies for robots to each team. The teams had six weeks to build robots that could compete in the LUNACY game. The playing area had six robots, three on each team. Each robot had a trailer(拖车) connected to it. The robots had to pick up large balls and throw them into the trailers of opposing robots. The robots were moving on a surface where they could slide(滑行). A team from California won the competition.

A second competition involved building a robot that could travel on uneven(不平坦的) surfaces, move objects with unusual shapes and withstand(承受) physical stress.

Another competition was for younger students, aged nine to fourteen years old. Eighty-four teams from twenty-seven countries competed with robots made with LEGO products. They had to design, build and program robots to explore the Earth’s climates.

小题1:The competitors coming from _______countries entered a level of competition called LUNACY.

A.twenty-eight

B.twenty-seven

C.eighty-four

D.eleven小题2:_______sent the supplies for robots to each team.

A.Schools

B.Volunteers

C.The government

D.The organization小题3:Each team can have _______robots to compete in the LUNACY game.

A.two

B.three

C.six

D.eight小题4:The underlined word “involved” in this passage can be replaced by “_______”.

A.included

B.removed

C.corrected

D.invented小题5:Which statement is NOT true according to the passage?

A.In January, each team got the same supplies for robots.

B.A team from California won the LUNACY competition.

C.The writer introduces three kinds of competitions in this passage.

D.The students had to design or buy robots for the competition.

答案

小题1:D

小题2:D

小题3:B

小题4:A

小题5:D

本文主要讲述的是机器人大赛的一些情况。

小题1:细节理解题。根据文章第二段第二行可知。

小题2:细节理解题。根据文章第二段第三行可知。

小题3:细节理解题。根据The playing area had six robots, three on each team. 可知

小题4:细节理解题。根据语境可知选A。

小题5:细节理解题。D项中的buy robots不符合文章。

问答题

某化学兴趣小组在化学实验室发现一瓶没有标签的淡黄色粉末,同学们对探究该粉末产生浓厚兴趣,并在老师的指导下进行探究活动。

【查阅资料】【提出问题】这种淡黄色粉末是什么?有什么性质和用途?

①硫是淡黄色粉末,不溶于水;②过氧化钠(Na2O2)是淡黄色粉末,在常温下能与水反应生成氢氧化钠(NaOH)和一种气体。

【猜想与探究】

猜想(1):淡黄色粉末可能是:a.硫;b.过氧化钠;c.硫和过氧化钠的混合物。

探究:过氧化钠与水反应的生成物的成分。

猜想(2):过氧化钠与水反应生成的气体可能是a氢气;b           ;

小明认为该气体不可能是氢气,理由是                                

【实验与结论】

 实验操作实验现象实验结论
猜想(1)在一支洁净的试管中加入适量的上述淡黄色粉末,再加入足量的蒸馏水 猜想a、c不成立,猜想b成立。
猜想(2)  生成物中的气体是___________
【继续探究】小组的同学查阅资料后发现过氧化钠还能作 为供氧剂,对此大 家产生了浓厚兴趣,大家讨论认为可能是CO2在常温下能与过氧化钠反应有关,于是设计下图所示的装置继续实验探究。

实验操作实验现象实验结论
①将CO2从a口处通入装置内,再把带火星的木条放在装置b口处木条复燃CO2在常温下能与过氧化钠反应,该反应的化学方程式为:

____________________________

②取出充分反应后的固体生成物于试管中,往试管内滴加稀盐酸,将生成的气体通入澄清石灰水中有气泡产生

石灰水变浑浊

【交流比较】与我们学过的制氧气方法相比,常选用过氧化钠作为呼吸面具和潜水艇的供氧剂的主要理由是(从两个不同角度回答):                、                 

单项选择题