有抗冻要求的混凝土工程,宜选用()水泥。 A.普通硅酸盐 B.矿渣硅酸盐 C.火山灰

题型:单项选择题

问题:

有抗冻要求的混凝土工程,宜选用()水泥。

A.普通硅酸盐

B.矿渣硅酸盐

C.火山灰质硅酸盐

D.粉煤灰硅酸盐

考点:工程材料土木工程材料综合练习土木工程材料综合练习题库
题型:单项选择题

— How about your journey to Canada?

— Everything was wonderful except that our car________.

A.slowed down

B.put down

C.got down

D.broke down

题型:单项选择题

1995年,被誉为“经济领域的联合国”的国际组织成立,促进了世界经济全球化的进程。该组织是

A.欧洲联盟

B.世界贸易组织

C.北大西洋公约组织

D.上海合作组织

题型:单项选择题
The lecture on smoking was over at last. As we boys were rushing towards the playground, Jim passed by the table. The watch, which Mrs Smith had 41_____ on the table as she started her lecture, had disappeared.
We were about to go back for class again when the headmaster called us 42_____ and said, “ I’ve got little 43_______ for you boys. Mrs Smith has just lost her watch on the playground. This kind of thing has happened 44______”.She said, “It just falls off her wrist (手腕).So, look around for it, will you? 45______ if you’re clever enough to find it. You will get a big reward(奖赏)”
At once we started looking for the watch. Everybody wished to be the 46____ one. Suddenly, Jim stopped and bent(弯)down as if to 47_____ something. And 48­­­­_______ he was in front of Mrs Smith, all smiles, 49______ the watch to her.
Mrs Smith, however, didn’t seem 50______ at all. In fact, she looked angry. She took the watch without 51______a “Thank you.”
Jim got his reward—a large piece of paper from the headmaster. He 52______Jim to write a composition 53______ the dangers of smoking. What could 54______ Jim write about? He hadn’t listened to the lecture and had nothing to say on the 55_____.
小题1:
A.seenB.droppedC.foundD.laid
小题2:
A.inB.togetherC.straightD.out
小题3:
A.funB.trickC.jobD.game
小题4:
A.beforeB.nowC.hereD.there
小题5:A. Say         B see               C. Gues             D. Check
小题6:
A.luckyB.quickC.earlyD.easy
小题7:
A.put downB.give outC.find outD.pick out
小题8:
A.the following momentB.the next moment
C.for a momentD.just a moment
小题9:
A.handing outB.turning inC.giving upD.send back.
小题10:
A.pleasedB.hurC.interestedD.worried
小题11:
A.justB.everC.evenD.almost
小题12:
A.hadB.madeC.toldD.helped
小题13:
A.ofB.onC.inD.at
小题14:
A.poorB.oldC.quickD.good
小题15:
A.lectureB.pointC.matterD.subject
题型:单项选择题

设函数f(x)=xα+1(α∈Q)的定义域为[-b,-a]∪[a,b],其中0<a<b.若函数f(x)在区间[a,b]上的最大值为6,最小值为3,则f(x)在区间[-b,-a]上的最大值与最小值的和为______.

题型:单项选择题

依《邮政法》规定,检查、扣押邮件的目的是为了( )。

A.保护通信自由和通信秘密
B.保证国家的安全或者出于追查刑事犯罪的需要
C.实施《刑事诉讼法》
D.履行《国际电信协议》

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