在装有新鲜血液的试管内,加入少量抗凝剂,充分振荡,过一段时间,血液分层后,从上至

题型:选择题

问题:

在装有新鲜血液的试管内,加入少量抗凝剂,充分振荡,过一段时间,血液分层后,从上至下依次为(  )

(1)血浆    (2)血细胞   (3)红细胞   (4)白细胞和血小板.

A.(1)(2)(3)

B.(2)(3)(4)

C.(1)(3)(4)

D.(1)(4)(3)

考点:血液的组成和功能
题型:选择题
阅读短文,用方框内所给单词的适当形式填空,使短文意思通顺、完整。(注意:①每个单词只能用一次。②其中有两个多余选项。)
everything,   robot,   spend,   factory,   fly,   able,   housework,   answer,   other,   work,   space,   science
     In one hundred years everyone will carry a small computer. The computer will give people the 1.______ to
all their questions. We will all have 2._______ at our home. So we'll be 3._______ to let robots do most of
the 4._______. While making a telephone call, we'll also be able to see the people on the 5._______ end at the
same time.
     A lot of people will live and work under sea or in 6._______ because there will be big towns and 7._______
there. Robots will do most of the work, and people will just 8._______ two or three days a week. They'll be able
to 9._______ to the moon in a spaceship and 10._______ their holidays there.
题型:选择题

腹部闭合性损伤,实质脏器破裂和空腔脏器穿孔最好的鉴别方法是()。

A.休克出现的早晚

B.腹膜刺激征的轻重

C.暴力作用的部位

D.腹腔诊断性穿刺

E.超声波检查

题型:选择题

长期应用能抑制胰高血糖素分泌的药物是

A.吡格列酮
B.格列本脲
C.二甲双胍
D.阿卡波糖
E.罗格列酮

题型:选择题

在报文数据的帧标志中变量“NID-C”地区编号中高7位=大区编号,低3位=分区编号

题型:选择题

反推控制系统的电源来自()

A、PE汇流条

B、PS1

C、PS2汇流条

D、B和C

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