心动周期中,从动脉瓣关闭到下一次动脉瓣开放的时间相当于() A.心室舒张期+等容舒张

题型:单项选择题 A1型题

问题:

心动周期中,从动脉瓣关闭到下一次动脉瓣开放的时间相当于()

A.心室舒张期+等容舒张期

B.心室舒张期+心室收缩期

C.心室舒张期+等容收缩期

D.等容收缩期+快速射血期

E.心室射血期+等容收缩期

考点:外科住院医师麻醉学麻醉学题库
题型:单项选择题 A1型题

男,出生后4个月出现气促。急诊查体:两肺湿啰音,胸骨左缘2~3肋间收缩期杂音,上肢动脉搏动强,股动脉搏动触及不清,最可能的诊断是()

A.室间隔缺损

B.房间隔缺损

C.主动脉缩窄

D.动脉导管未闭

E.法洛四联症

题型:单项选择题 A1型题

下列属于巴罗克时期的代表人物是()。

A.舒伯特

B.李斯特

C.亨德尔

D.德沃夏克

题型:单项选择题 A1型题

易燃性建筑材料()

A、塑料

B、水泥刨花板

C、合成橡胶

D、板条抹灰

题型:单项选择题 A1型题

阅读理解。

     One night, as Diaz stepped off the train and onto a nearly empty platform, a teenage boy approached

and pulled out a knife.

     "He wanted my money, so I just gave him my wallet and told him, 'Here you go '" Diaz says.

     As the teen began to walk away, Diaz told him, "Hey, wait a minute. You forgot something. If you're

going to be robbing people for the rest of the night, you might as well take my coat to keep you warm."

     The robber looked at him puzzled, saying, "Why are you doing this?"

     Diaz replied, "If you're willing to risk your freedom for a few dollars, then you must really need the

money. I mean, all I wanted to do was get dinner and if you really want to join me….."

     Diaz says he and the teen went into a diner and sat in a booth.

     "The manager comes by, the dishwashers come by, the waiters come by to say hi," Diaz says.

     The kid said, "You know everybody here. Do you own this place?"

     "No, I just eat here a lot," Dias said. "But you're even nice to the dishwasher," he said.

     Diaz replied, "Well, haven't you been taught you should be nice to everybody?"

     "Yea, but I didn't think people actually behaved that way," the teen said.

     When the bill arrived, Diaz said, "You're going to have to pay for this bill because you have my

money and I can't pay for this. So if you give me my wallet back, I'll gladly treat you."

     The teen returned it immediately. "I gave him $20…I figure maybe it'll help him." Diaz says he asked

for something in return--- the teen's knife--- "and he gave it to me."

     Afterwards, when Diaz told his mother what happened, she said, "You're the type of kid that if

someone asked you for the time, you gave them your watch."

     "I figure, you know, if you treat people right, you can only hope that they treat you right. It's as simple

as it gets in this complicated world."

1. What did Diaz do to the teen?

A. He gave the teen a new wallet

B. He treated the teen to dinner

C. He gave his coat to the teen

D. He taught the teen a lesson

2. From the passage we can infer that the boy _______.

A. expressed his gratitude for Diaz's kindness

B. gave up the idea of robbing in the end

C. wasn't taught how to be nice to everybody

D. gave the knife to Diaz in return for his forgiveness

3. For what Diaz did, his mother showed an attitude of _______.

A. complaint          

B. concern          

C. criticism            

D. praise

4. By telling the story of Diaz, the author intends to tell us ______.

A. to keep calm in danger

B. not to go out alone at night

C. to treat others kindly

D. not to harm others on purpose

题型:单项选择题 A1型题

氨基酸具有两性解离特性,因此它既可被()滴定,又可被()滴定。丙氨酸的PKα-COOH=2.34,PKα-NH3+=9.69,其pI=(),在pH=7时,在电场中向()极方向移动。

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