贫血起病缓慢,血红蛋白虽低下,但仍无明显症状,其原因主要是A.红细胞内2,3-二磷酸

题型:单项选择题

问题:

贫血起病缓慢,血红蛋白虽低下,但仍无明显症状,其原因主要是

A.红细胞内2,3-二磷酸甘油酸(2,3-DPG)的产生及浓度增高

B.体内循环血量无改变

C.骨髓代偿性增生

D.心血管的代偿功能

E.血红蛋白与氧的亲和力增加

考点:临床执业助理医师内科学临床执业助理医师考试真题
题型:单项选择题

在“用电压表和电流表测灯泡电阻的实验”中.

(1)实验的原理是:______.

(2)在下面方框中画出实验电路图.并根据电路图在图中将实物电路连接起来.(要求:滑动变阻器的滑片向右移时电流表示数变大)

(3)表中给出了前两次的测量结果,请你依据如图所给的第三次实验中电压表、电流表示数,此时灯泡电阻阻值是:______Ω.分析实验数据发现,实验的第一组电阻和第二组电阻值相差近1Ω,实验过程和读数都没有问题,那么可能的一个原因是:______.

实验序号电压/V电流/A电阻/Ω
12.00.405.00
22.50.445.68

题型:单项选择题

下列通气模式中属于辅助模式的是()

A.CMV

B.IMV

C.SIMV

D.CPAP

E.PEEP

题型:单项选择题

(D)

At a certain time in our lives we consider every place as the possible site for a house. I have thus searched the country within a dozen miles of where I live. In imagination I have bought all the farms, one after another, and I knew their prices.

The nearest thing that I came to actual ownership was when I bought the Hollowell place. But before the owner completed the sale with me, his wife changed her mind and wished to keep it, and he offered me additional dollars to return the farm to him. However, I let him keep the dollars and sold him the farm for just what I gave for it.

The real attractions of the Hollowell farm to me were its position, being about two miles from the village, half a mile from the nearest neighbor, bounded(相邻) on one side by the river, and separated from the highway by a wide field. The poor condition of the house and fences showed that it hadn’t been used for some time. I remembered from my earliest trip up the river that the house used to be hidden behind a forest area, and I was in a hurry to buy it before the owner finished getting out some rocks, cutting down the apple trees, and clearing away some young trees which had grown up in the fields. I wanted to buy it before he made any more of his improvements. But it turned out as I have said.

I was not really troubled by the loss. I had always had a garden, but I don’t think I was ready for a large farm. I believe that as long as possible it is better to live free and uncommitted(无牵无挂). It makes but little difference whether you own a farm or not.

57.What do we know about the author?

A. He wanted to buy the oldest farm near where he lived.

B. He made a study of many farms before buying.

C. He made money by buying and selling farms.

D. He had the money to buy the best farm in the country.

58.Why did the author want to buy the farm in a hurry?

A. He was afraid the owner might change his mind.

B. He hoped to enlarge the forest on the farm.

C. He wanted to keep the farm as it was.

D. He was eager to become a farm owner.

59.The underlined words “the loss” in the last paragraph refer to _____?

A. the money the author lost in buying the farm

B. the sale of the garden in the Hollowell place

C. the removal of the trees around the house

D. the failure to possess the Hollowell place

60.What does the author believe as important in life?

A. To own a farm               B. To satisfy his needs

C. To be free from worries.       D. To live in the countryside.

题型:单项选择题

肝微粒体药物代谢酶系中主要的氧化酶是( )。

A.黄嘌呤氧化酶

B.醛氧化酶

C.醇脱氢酶

D.P-450酶

E.假性胆碱酯酶

题型:单项选择题

线程在生命周期中要经历五种状态,在不使用stop()方法的情况下,线程当前处于终止状态,则它的上一个状态是( )。

A.新建状态

B.阻塞状态

C.可运行状态

D.运行状态

更多题库