中国古代下列瓷器品种,最早出现的是 A.白瓷 B.青瓷 C.青花瓷 D.五彩瓷

题型:选择题

问题:

中国古代下列瓷器品种,最早出现的是                                

A.白瓷

B.青瓷

C.青花瓷

D.五彩瓷

考点:艰难经营的民间手工业素称发达的官营手工业(青铜器、瓷器、丝织业)黄道婆推广先进的棉纺织技术中国古代手工业享誉世界
题型:选择题

.(1)发现燃料渗漏 (2)火箭组装完成(3)取消发射计划 (4)进入倒计时(5)固定在发射架上

A. 2—1—3—5—4

B. 2—5—4—1—3

C.4—2—5—1—3

D.5—4—2—3—1

题型:选择题

下列哪些药物增加胃酸分泌()

A.组胺

B.阿托品

C.乙酰胆碱

D.毛果芸香碱

E.西米替丁

题型:选择题

Ever tried taking smart drugs to perform better in exams? They certainly work. Before last summer's exam, a few of my mates, merely out of curiosity, took a considerable amount of Modafinil, a drug normally used for narcolepsy(嗜眠发作症). Guess what? While I was feeling sleepy, bored by revision, my mates were more focused.

Modafinil is a smart drug that gives a user a feeling of staying awake for hours. It also sharpens the mind, improves memory and helps problem-solving.

But it does more than just keeping you awake. It disturbs your mental system, making you desperate to do what you are doing. You just don't want to do anything else but revise all the time non-stop.

A recent study discovers that healthy people use smart drugs, like Modafinil, to get down to and complete tasks they have been putting off, because these tasks seem more enjoyable when taking these drugs. This might sound like what a stressed student desires. However, the pills have a range of side-effects.

"At present no evidence shows that these drugs are safe in healthy people," as a medical expert puts it, "Ordering online, though easy, is a dangerous way to obtain drugs. You never know what you're actually purchasing. "

In my experience, Modafinil changes people's behaviour too. Over those weeks my friends became different people—in turn aggressive, cold. Even eating became "a waste of time" and so did conversation.

A BBC survey found that of those who had tried smart drugs before, 92% would do so again. My friends say they'd happily do so without considering the practice a form of cheating.

I admit I was curious—but not enough to try it. Seeing the strange behaviour of other users, I feel a little bit upset and scary. Modafinil may promise to change your grades, but it might also change the way you act. Don't say you haven't been warned!

小题1:According to the author, his mates took Modafinil for the purpose of______.

A.escaping from reality

B.getting better exam results

C.curing their narcolepsy

D.leading an active life小题2:Taking the smart drug can lead to ______.

A.cheating in the exam

B.dropping out of school

C.youth crime(犯罪)

D.drug addiction(上瘾)小题3:What does the author think of his mates' taking the smart drugs?

A.Worrying.

B.Inspiring.

C.Acceptable.

D.Reasonable.小题4:Which statement about Modafinil is wrong?

A.Modafinil sharpens the mind and helps problem-solving.

B.Modafinil more than just keeps you awake.

C.Modafinil has a range of side effects.

D.Modafinil is safe in healthy people.小题5:Who are the target readers of this passage?

A.Teachers.

B.Doctors.

C.Scientists.

D.Students.

题型:选择题

在系统引导过程中,为了记录重要的事件和查看引导信息,执行的命令是()?

A、alog

B、errpt

C、logger

D、bootlist

题型:选择题

布袋过滤器一般要求气流通过滤袋之间的袋间隙速度不超过1.1~1.3m/s,其目的是()。

A、防止过滤速度太快

B、避免袋底尖角被夹带粉尘的气流过早磨损

C、减小或防止二次扬尘

D、延长布袋使用寿命

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