下列各项,肺结核咯血时首选止血剂是() A.氨基己酸 B.氨甲苯酸 C.垂体后叶素

题型:单项选择题

问题:

下列各项,肺结核咯血时首选止血剂是()

A.氨基己酸

B.氨甲苯酸

C.垂体后叶素

D.安络血

E.止血敏

考点:神经电生理(脑电图)技术(医学高级)内科学内科学题库
题型:单项选择题

A student newspaper reports that most students go to sleep at 1:30 am. Even if that’s an overstatement (夸张), it’s close to the truth. Scientists say teens should sleep nine hours each night. But that’s hard. Some are even “pulling all-nighters” (开夜车). These students must hand in their homework the next day but they haven’t done it. In the morning they don’t look healthy and you can tell who’s been doing it. One of my classmates did a survey on the topic. She found that most kids pull all-nighters to finish homework, but some do it for other reasons, such as playing computer games!

Maybe our lack(缺乏) of sleep is because of laziness — I think I’m a rather lazy student — or maybe it’s because we have too much to do in American high schools. I usually go to bed around midnight. If I stayed up past 1:30 am, I wouldn’t get any work done. I’d be falling asleep at my computer. My classes begin at 7:30 am. I’m partly awake in my first class. By the second, I’m a little sleepy. By my third class, I’m sleepy. By midday I’m finally fully awake. But by 3:00 pm, I’m slowing down again. Yet I get more sleep than usual students.

Most American high schools seem to have a similar(相似的) problem with sleepy students. High school classes start at 7:30 am, so students have to get up one and a half hours before that to get ready and catch the bus. It’s believed that lack of sleep can be bad for both grades and health. Some schools are paying attention. Classes in those schools start at 8:30 am.

小题1:What does the underlined sentence “it’s close to the truth” mean?

A.It doesn’t tell the truth.

B.It is quite true.

C.It is impossible.

D.I don’t think it’s right.小题2:Why do most of the teens have to stay up late?

A.They play computer games.

B.They watch videos late.

C.They have to do a lot of housework.

D.They have to do a lot of homework.小题3:When do students in most American high schools have to get up?

A.At 7:30 am.

B.At 6:00 am.

C.At 9:00 am.

D.At about 7:00 am.小题4:Which of the following is TRUE according to the reading?

A.The writer usually stays up past 1:30 am.

B.The writer usually goes to bed around midnight.

C.The writer usually does a survey.

D.Many American students don’t get enough sleep, so they can have high grades.小题5:What’s the main idea of the passage?

A.Something has to be done to solve the problem of students’ lack of sleep.

B.Many American high school students are sleepy in class.

C.Many kids have too much homework to do.

D.Students can’t play computer games.

题型:单项选择题

保证架棚支护质量必须做到哪“三好”?()

A、规格尺寸好

B、结构受力好

C、光泽好

D、稳定性好

题型:单项选择题

内锁闭道岔的哪些杆件的两端与基本轨或中心线的垂直偏差不大于20mm()。

A.拉杆

B.密贴调整杆

C.表示杆

D.尖端杆

题型:单项选择题

下列说法中正确的是[ ]

A.若动力臂大于阻力臂,则可知动力一定小于阻力  

B.在实际生活中既省力又省距离的杠杆是存在的  

C.使用杠杆不一定省力  

D.动力和阻力的方向可能相同

题型:单项选择题

深Ⅱ度烧伤创面的临床特点是()。

A.创面感觉消失

B.水疱较小,创面微湿,红白相间,感觉迟钝

C.水疱较大饱满,感觉迟钝,基底潮红

D.水疱饱满,有剧痛和感觉过敏

E.局部红肿,有烧灼感

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