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【单选题】
在进行轴的疲劳强度计算时,若同一截面上有几个应力集中源,则应力集中系数应取为 _____ 。
A.
各应力集中系数
B.
其中较大值
C.
平均值
D.
其中较小值
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举一反三
【单选题】What happened to Ms. White after she was taken back to the store?
A.
She was questioned by the police.
B.
She was shut in a small room for 20 minutes.
C.
She was insulted by the shopper around her.
D.
She was body-searched by the store manager.
【单选题】What happened to Ms. White after she was taken back to the store?
A.
She was questioned by the police.
B.
She was shut in a small room for 20 minutes.
C.
She was insulted by the shoppers around her.
D.
She was body-searched by the store manager.
【单选题】肾上腺素对血管作用的叙述,错误的是
A.
皮肤、粘膜血管收缩强
B.
微弱收缩脑和肺血管
C.
肾血管扩张
D.
骨骼肌血管扩张
E.
舒张冠状血管
【单选题】肾上腺素对血管作用的叙述,错误的是
A.
皮肤、粘膜血管收缩强烈
B.
微弱收缩脑和肺血管
C.
肾血管扩张
D.
骨骼肌血管扩张
E.
冠状血管扩张
【多选题】从规划开始都要贯彻“以人为本”这一服务宗旨,具体表现 在 () 三个方面
A.
方便快捷
B.
安全标志
C.
安全
D.
指向
E.
舒适
【单选题】下列关于肾上腺素和去甲肾上腺素对心血管作用的叙述,错误的是
A.
去甲肾上腺素有强烈的缩血管作用
B.
两者都可引起肝脏血管收缩
C.
肾上腺素使心率增加,心肌收缩力加强
D.
肾上腺素对总外周阻力影响不大
E.
去甲肾上腺素对β2肾上腺素能受体的作用比肾上腺素弱
【单选题】Why was the woman at the airport?
A.
She was sraveling on business.
B.
She was seeing the man off.
C.
She was leaving for Greece.
【单选题】肾上腺素对血管作用的叙述错误的是
A.
皮肤、粘膜血管收缩强烈
B.
微弱收缩脑和肺血管
C.
肾小管扩张
D.
骨骼肌血管扩张
E.
舒张冠状血管
【多选题】从规划开始都要贯彻“以人为本”这一服务宗旨,具体表现在( )三个方面
A.
方便、快捷
B.
舒适
C.
安全
D.
位置
E.
方向
【单选题】It was a quarter past nine as Marie hurried into the office building where she was going to work. Her bus moved slowly along through【C1】______morning traffic, making her a few minutes late for her ver...
A.
light
B.
heavy
C.
strong
D.
serious
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