动脉导管未闭有显著肺动脉高压时可出现A.头面部青紫 B.上半身青紫 C.全身青紫 D

题型:单项选择题

问题:

动脉导管未闭有显著肺动脉高压时可出现

A.头面部青紫

B.上半身青紫

C.全身青紫

D.末梢青紫

E.下半身青紫

考点:临床执业助理医师儿科学血液系统疾病
题型:单项选择题

给下面的句子加上恰当的标点符号。

1.我们沙地里 潮汛要来的时候 就有许多跳鱼儿只是跳 都有青蛙似的两个脚  

2.先生 他那灰白的抽动着的嘴唇里发出低微的声音 没留心 踩在碎玻璃上 玻璃片插进脚底了 疼得厉害 回不了家啦

3.碰壁 我说 您怎么会碰壁呢 是不是走路不小心

4.近处 凝聚在树叶上的雨珠还往下滴着 滴落在路旁的小水洼中 发出异常清脆的音响 丁 冬 丁 冬

题型:单项选择题

Lying in the sun on a rock, the cougar saw Jeb and his son, Tom, before they saw it. Jeb put his bag down quickly and pulled his jacket open with both hands, making himself look big to the cougar. It worked. The cougar hesitated, ready to attack Jeb, but ready to forget the whole thing, too.
Jeb took off his jacket, grasped Tom and held him across his body, making a cross. Now the cougar’s enemy looked even bigger, and it rose up, ready to move away, but unfortunately Tom got scared and struggled free of Jeb.
"Tom, No !" shouted his father.
But Tom broke and ran and that’s the last thing you do with a cougar. The second Tom broke free, Jeb threw himself on the cougar, just as it jumped from the rock. They hit each other in mid air and both fell. The cougar was on Jeb in a flash, forgetting about Tom, which was what Jeb wanted. Cougars are not as big as most people think and a determined man stands a chance, even just with his fists. As the cougar’s claws got into his left shoulder, Jeb swung his fist at its eyes and hit hard. The animal howled(吼叫) and put its head back. Jeb followed up with his other fist. Then out of the corner of his eye, Jeb saw Tom. The boy was running back to help his father.
"Knife, Tom," shouted Jeb.
The boy ran to his father’s bag, while Jeb started shouting as well as hitting, to keep the cougar’s attention away from Tom. Tom got the knife and ran over to Jeb. The cougar was moving its head in and out, trying to find a way through the wall. Jeb was making out of his arms. Tom swung with the knife, into the cougar’s back. It howled horribly and ran off into the mountains.

What do we know about cougars

A.They are afraid of noises.
B.They hesitate before they hit.
C.They are bigger than we think.
D.They like to attack running people.

题型:单项选择题

短周期元素X、Y、Z在周期表中的位置如图所示,则下列说法错误的是

[ ]

A.X、Y、Z中X的单质最稳定

B.Y的氢化物为HY

C.X能生成HXO

D.能发生反应Cl2+H2Z = Z+2HCl

题型:单项选择题

下列哪项不是神经-肌接头兴奋传递特点()

A.1:1传递

B.单向传递

C.时间延搁

D.对内环境变化和药物敏感

E.不易疲劳

题型:单项选择题

热媒管道连接方式多为焊接,焊工应持有焊工合格证方可上岗,管工应配合焊工进行焊前组装对口。( )

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