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【单选题】
推力轴承不适用于高转速的轴,这是因为高速时造成 ,从而轴承寿命严重下降。设计高转速轴支承,可以代替推力轴承使用的是 。A.
(A)圆周速度过大，圆锥滚子轴承
B.
(B)滚动体离心力过大，单列向心球轴承
C.
(C)冲击过大，单列向心短圆柱滚子轴承
D.
(D)滚子阻力过大，向心球面滚子轴承
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举一反三
【单选题】Listen to the first part of the interview and choose what the three priorities she mentions from the list below. 1. Good organization 2. Easy booking 3. Regular transport 4. Balancing cost with comfor...
A.
1.4.5.
B.
1.2.5.
C.
1.3.5.
【单选题】Listen to(1.4-3)and answer: What's Chintal Patel's occupation? He is a ________________.
A.
software designer
B.
computer programmer
C.
sales representative
D.
sales manager
E.
graphic designer
【单选题】Directions: Record 2.3 Stephanie Taylor is a businesswoman who travels regularly as part of her job. Listen to the first part of the interview and choose what the three priorities she mentions from th...
A.
1.4.5.
B.
1.2.5.
C.
1.3.5.
【简答题】骨骼肌、平滑肌和腺体属于 （ ）
【单选题】Record 2.3 Stephanie Taylor is a businesswoman who travels regularly as part of her job. Listen to the first part of the interview and choose what the three priorities she mentions from the list below...
A.
1.4.5.
B.
1.2.5.
C.
1.3.5.
【多选题】关于腔隙性脑梗死类型中的纯运动性轻偏瘫，下列哪项正确（）
A.
腔隙综合征中最常见的类型
B.
在脑干损害，偏瘫不伴眩晕、耳聋、复视、眼震或小脑性共济失调
C.
病灶多位于放射冠、内囊、大脑脚或延髓的锥体束
D.
肢体部分运动障碍则很可能是腔隙性脑梗死造成的
【简答题】骨骼肌、平滑肌和腺体属于
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