输血应以输同型血为原则,否则,输血后,受血者的某种血细胞会凝集成团,阻碍血液循环

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问题:

输血应以输同型血为原则,否则,输血后,受血者的某种血细胞会凝集成团,阻碍血液循环,后果严重。这种血细胞是(  )

A.红细胞

B.白细胞

C.血小板

D.血浆

考点:血液的组成和功能观察实验:观察人血的永久涂片观察实验:观察小鱼尾鳍内血液的流动
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下列各句中没有通假字的一句是(  )

A.我决起而飞

B.小知不及大知

C.此小大之辩也

D.彼其于世,未数数然

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关于匀速圆周运动的说法,正确的是(  )

A.匀速圆周运动的速度大小保持不变,所以做匀速圆周运动的物体没有加速度

B.做匀速圆周运动的物体,虽然速度大小不变,但方向时刻都在改变,所以必有加速度

C.做匀速圆周运动的物体,加速度的大小保持不变,所以是匀变速(曲线)运动

D.匀速圆周运动的物体加速度大小虽然不变,但加速度的方向始终指向圆心,加速度的方向时刻都在改变,所以匀速圆周运动既不是匀速运动,也不是匀变速运动

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深度线索

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为避免椎弓峡部骨折漏诊,应()。

A.照损伤脊椎正侧位

B.照损伤脊椎侧位

C.照损伤脊椎斜位

D.CT检查

E.MRI检查

题型:选择题

For many people today, reading is no longer relaxation. To keep up their work they must read letters, reports, trade publications, interoffice communications, not to mention newspapers and magazines: a never ending flood of words. In (1) a job or advancing in one, the ability to read and comprehend (2) can mean the difference between success and failure. Yet the unfortunate fact is that most of us are (3) readers. Most of us develop poor reading (4) at an early age, and never get over them. The main deficiency (5) in the actual stuff of language itself—words. Taken individually, words have (6) meaning until they are strung together into phrases, sentences and paragraphs. (7) , however, the untrained reader does not read groups of words. He laboriously reads one word at a time, often regressing to (8) words or passages. Regression, the tendency to look back over (9) you have just read, is a common bad habit in reading. Another habit which (10) down the speed of reading is vocalization—sounding each word either orally or mentally as (11) reads.
To overcome these bad habits, some reading clinics use a device called an (12) , which moves a bar(or curtain) down the page at a predetermined speed. The bar is set at a slightly faster rate (13) the reader finds comfortable, in order to "stretch" him. The accelerator forces the reader to read fast, (14) word by word reading, regression and subvocalization practically impossible. At first (15) is sacrificed for speed. But when you learn to read ideas and concepts, you will not only read faster, (16) your comprehension will improve. Many people have found (17) reading skill drastically improved after some training. (18) Charlie Au, a business manager, for instance. His reading rate was a reasonably good 172words a minute (19) the training; now it is an excellent 1,378 words a minute. He is delighted that how he can (20) a lot more reading material in a short period of time.

A.master
B.go over
C.present
D.get through

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