题干

Why not stay at home ________ the road is so slippery after the heavy snow?

A:in case

B:as long a

C:now that

D:even if

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答案(点此获取答案解析)

C

同类题2

根据材料内容,从方框中选择合适的句子填入文中空白处,使材料完整、通顺。其中有一个句子是多余的。

C

    In this week's Students Around the World ,Kim talks with Lisa Conroy, a college student from the USA,about her expenses(花费).

(K=Kim;L=Lisa)

K:Thanks for talking with me today, Lisa.____

L:Well.I'm twenty—one,and I'm studying at a university in Chicago.

K:____

L:My expenses for every term are almost$15,000.At the start of each term parents pay the $10,000 tuition(学费).I also get$2,000 from my college.I have to earn(挣)$3,000 myself.

K:How do you do that?

L:I have a part—time job at a hotel.I work about twenty hours a week,and cam$300.

K:____

L:It helps to pay for my rent(房租)and meals at college.It also pays for things like my phone,books,and clothes.

K:____

L:That's true! My mother advised me to spend my money carefully so I don't have to borrow.I hardly ever go to the movies.My roommates and I usually watch movies online,so it's cheaper.

K:____

L:I don't go to restaurants.I cook with my roommates so it's cheaper to eat.I try to walk or ride my bicycle to college. Oh,and I buy a lot of my clothes at second-hand stores.You can find some very cheap,nice clothes in those stores.

A.How else do you save(节省)money?

B.How do you spend that money?

C.Could you tell us a little about yourself?

D.Do you often ask for money from your parents?

E.How are you paying for your college education?

F.You don't use much money for fun,do you?

同类题5

阅读《探秘世界最大“观天巨眼”》,回答问题.

探秘世界最大“观天巨眼”

贵州正在建设中的世界最大单口球面射电望远镜工程(英文简称FAST),被当地人形象地称为中国的“观天巨眼”,如图所示. 据介绍,射电望远镜的直径越大,灵敏度越高,能搜寻的宇宙信息越丰富.此前,世界最大的射电望远镜是由美国研发的、位于波多黎各的阿雷西博305米望远镜.FAST将打破这一纪录,使中国射电天文学在10到20年内保持世界领先地位.

FAST虽是射电望远镜,却不喜欢待在一个有电的环境里,哪怕是一丁点的电波都难以忍受.中国科学院国家天文台FAST工程总工程师曾有一个形象的说法,不要说用手机,就算是附近使用电器,或者几十公里外有飞机向地面发送信息,在FAST那里都会造成一场电磁风暴.

作为射电望远镜,FAST的基本原理和人们常见的锅式卫星天线相差无几,FAST这口“锅”更大,主反射面的面积达25万平方米,主要由反射信号的抛物面和接收信号的馈源两大部分组成,通过“锅”的反射聚焦,把几平方米到几千平方米的信号聚拢到一点上.从天体投射来并汇集到望远镜焦点的射电波.射电波实际是无线电波的一部分,地球大气层吸收了来自宇宙的大部分电磁波,只有可见光和部分无线电波可以穿透大气层,天文学把这部分无线电波称为射电波.

(1)手机是一种移动通信工具,它是利用____ 波进行远程信息传递的,FAST射电望远镜正常工作时____ 使用手机.(选填“可以”或“不可以”)

(2)射电波在真空中的传播速度为____ m/s.

(3)射电望远镜利用了电磁波可以发生____ 进行信号收集的.