在人体吸入和呼出的气体中,含量最多的都是 [ ] A.氧气 B.氮气 C.二氧化

题型:选择题

问题:

在人体吸入和呼出的气体中,含量最多的都是 [ ]

A.氧气

B.氮气

C.二氧化碳

D.水蒸气

考点:肺与外界的气体交换肺泡与血液的气体交换
题型:选择题

患儿女,1岁,因持续发热1周,口腔溃疡4天就诊。查体:口内黏膜广泛充血水肿,上颚和龈缘可见成簇针头大小的透明水泡,部分已破溃成为浅表溃疡。

本病的致病微生物可能是()。

A.白喉杆菌

B.白色念珠菌

C.单纯疱疹病毒

D.带状疱疹病毒

E.柯萨奇病毒A4

题型:选择题

患者喘促短气,气怯声低,喉有鼾声,咳声低弱,痰吐稀薄,自汗畏风,舌质淡红,脉软弱。

(假设信息)若患者咳呛,痰少质黏,烦热而渴,咽喉不利,面颧潮红,舌苔花剥,脉细数。治疗应首选

A.射干麻黄汤
B.平喘固本汤
C.定喘汤
D.三子养亲汤
E.生脉散

题型:选择题

某实验小组利用如图甲所示的装置验证牛顿第二定律。他们将拉力传感器一端与细绳相连,另一端固定在小车上,用拉力传感器及数据采集器记录小车受到的拉力F的大小;小车后面的打点计时器,通过拴在小车上的纸带,可测量小车匀加速运动的速度与加速度。图乙中的纸带上A、B、C为三个计数点,每两个计数点间还有打点计时器所打的4个点未画出,打点计时器使用的是50Hz交流电源。

图 乙

(1)由图乙,AB两点间的距离为S1=3.27cm,AC两点间的距离为S2=_________cm,小车此次运动经B点时的速度_________m/s,小车的加速度a =_________m/s2;(保留三位有效数字)  

(2)要验证牛顿第二定律,除了前面提及的器材及已测出的物理量外,实验中还要使用              来测量出_________; 

(3)由于小车受阻力f的作用,为了尽量减小实验的误差,需尽可能降低小车所受阻力f的影响,以下采取的措施中必要的是_________

A、适当垫高长木板无滑轮的一端,使未挂钩码的小车被轻推后恰能拖着纸带匀速下滑

B、应使钩码总质量m远小于小车(加上传感器)的总质量M

C、定滑轮的轮轴要尽量光滑

题型:选择题

Questions 1~5


Writing articles about films for The Front Page was my first proper job. Before then I had done bits of reviewing—novels for other newspapers, films for a magazine and anything I was asked to do for the radio. That was how I met Tom Seaton, the first arts editor of The Front Page, who had also written for radio and television. He hired me, but Tom was not primarily a journalist, or he would certainly have been more careful in choosing his staff.
At first, his idea was that a team of critics should take care of the art forms that didn’t require specialized knowledge: books, TV, theatre, film and radio. There would be a weekly lunch at which we would make our choices from the artistic material that Tom had decided we should cover, though there would also be guests to make the atmosphere sociable.
It all felt a bit of a dream at that time: a new newspaper, and I was one of the team. It seemed so unlikely that a paper could he introduced into a crowded market. It seemed just as likely that a millionaire wanted to help me personally, and was pretending to employ me. Such was my lack of self-confidence. In fact, the first time I saw someone reading the newspaper on the London Underground, then turning to a page on which one of my reviews appeared, I didn’t know where to look.
Tom’s original scheme for a team of critics for the arts never took off. It was a good idea, but we didn’t get together as planned and so everything was done by phone. It turned out, too, that the general public out there preferred to associate a reviewer with a single subject area, and so I chose film. Without Tom’s initial push, though, we would hardly have come up with the present arrangement, by which I write an extended weekly piece, usually on one film.
The space I am given allows me to broaden my argument—or forces me, in an uninteresting week, to make something out of nothing. But what is my role in the public arena I assume that people choose what films to go to on the basis of the stars, the publicity or the director. There is also such a thing as loyalty to "type" or its opposite. It can only rarely happen that someone who hates westerns buys a ticket for one after reading a review, or a love story addict avoids a romantic film because of what the papers say.
So if a film review isn’t really a consumer guide, what is it I certainly don’t feel I have a responsibility to be "right" about a movie. Nor do I think there should be a certain number of "great" and "bad" films each year. All I have to do is put forward an argument. I’m not a judge, and nor would I want to be.

According to the author, his articles ______.

A. are seldom read by filmgoers
B. are ignored by stars and film directors
C. have little effect on public viewing habits
D. have greater persuasion than people realize

题型:选择题

以下哪项不属于朱智贤等人提出的心理发展的参数()

A.心理发展是由量变到质变的

B.发展的关键期

C.发展的速度

D.发展的差异性

更多题库