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【判断题】
差速离心法是指通过不断增加相对离心力,使沉降速度不同的颗粒,在不同离心速度及不同离心时间下分批离心的方法A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】体育心理学的多维性含义是什么?
【单选题】对青少年学生来说，以健身为目的的耐力练习心跳、脉搏应该维持在多少为宜（）
A.
120—140次/分
B.
120—170次/分
C.
130—160次/分
D.
140-180次/分
【多选题】What is Mark Zuckerberg and Jack Ma’s suggestions for new entrepreneurs based on their talk in Lesson 2?
A.
Sell your house if necessary to set up a company
B.
It’s very cool to have a company in the Silicon Valley no matter the founder has a clear goal or not.
C.
You’d better have a clear idea about what problem you wish to solve before you set up a company.
D.
The most important thing is to have a real passion of the working you are doing.
【多选题】What is Mark Zuckerberg and Jack Ma's suggestions for new entrepreneurs based on their talk in Lesson 2?（2 answers)
A.
Sell your house if necessary to set up a company.
B.
It ’ s very cool to have a company in the Silicon Valley no matter the founder has a clear goal or not.
C.
You ’ d better have a clear idea about what problem you wish to solve before you set up a company.
D.
The most important thing is to have real passion for your work.
【单选题】脉搏应该维持在多少为宜()
A.
. 120— 140次 /分
B.
. 120— 170次 /分
C.
. 130— 160次 /分
D.
. 140— 180次 /分
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