在心尖区触及舒张期震颤可见于 A．肺动脉瓣狭窄 B．动脉导管未闭 C．二尖瓣狭窄 D

发布时间：2018-06-17 06:04 │ 来源：www.tikuol.com

题型：单项选择题

在心尖区触及舒张期震颤可见于

A．肺动脉瓣狭窄
B．动脉导管未闭
C．二尖瓣狭窄
D．二尖瓣关闭不全
E．主动脉瓣狭窄

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某管道如图所示，当管道阀门F完全关闭时，A点处的压力表读数为0.5at（工程大气压），将阀门F打开，压力表读数降至0.3at，若水箱水面高度H保持不变，且压力表前管道损失为1．0m水柱高，则管中断面平均流速为（）m/s。

A．2.22

B．3.13

C．4.43

D．6.26

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题型：单项选择题

完形填空。
My pen friend is a kind and friendly girl. She is in England. Her 1 is Connie. I meet Connie 2 the Internet, and we are both twelve years 3 . First, I 4 a letter to her and introduce my hobbies, my school and my daily life. A few days later, I receive Connie’s 5 . She 6 me a lot about herself. I learn that she loves languages, sports and movies. She likes China and Chinese food very much. She tells me something about England, too. Connie is good at English, French（法语）and Spanish（西班牙语）, so I ask her to 7 me a little of them. Connie wants to learn some 8 , but it’s very difficult for her. Through Connie, I know 9 about the world outside. I would like to 10 Connie some day in England.
( )1. A. hobby ( )2. A. on ( )3. A. young ( )4. A. read ( )5. A. book ( )6. A. asks ( )7. A. teach ( )8. A. English ( )9. A. more ( )10. A. call	B. name B. for B. big B. sing B. letter B. says B. help B. French B. less B. write	C. age C. at C. small C. write C. call C. talks C. give C. Chinese C. few C. visit	D. job D. in D. old D. draw D. photo D. tells D. answer D. Spanish D. little D. help

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题型：单项选择题

目前诊断半月板撕裂敏感性和特异性最高的影像学检查方法是（）。

A.X线平片

B.X线关节造影

C.MRI检查

D.CT

E.关节镜检查

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题型：单项选择题

在10 L密闭容器中，1 mol A和3 mol B在一定条件下反应：A（气）＋xB（气）2C（气），2min后反应达到平衡时，测得混合气体共3．4 mol，生成0．4 mol C，则下列计算结果不正确的是 [ ]

A．平衡时，物质的量比A∶B∶C＝2∶11∶4 　　

B．x值等于4 　　

C．A的转化率20％　　

D．B的平均反应速率为0.04

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题型：单项选择题

《西方名言》礼仪是我们共同交往的（）

A.特征

B.文化

C.金钥匙

D.需求

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