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【多选题】
运动时具有出汗率高的特点,出汗率的多少与运动强度呈正相关,也受下面哪些因素的影响。
A.
热辐射
B.
运动持续时间
C.
运动员的适应程度
D.
气温和湿度
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【单选题】用同一平面上的三个支承点对工件的平面进行定位,能限制其( )自由度
A.
一个移动一个转动
B.
两个移动一个转动
C.
一个移动两个转动
D.
两个移动两个转动
【判断题】AVERAGE函数可用于计算简单算术平均值。()
A.
正确
B.
错误
【单选题】The idea of public works projects as a device to pr or control depression was designed as a means of creating job opportunities for unemployed workers and as a 'pump-priming' device to aid busine...
A.
letters were reversed
B.
work projects of the former were carded ont by the Federal government
C.
government subsidized private industry
D.
number of unemployed was reduced
【判断题】用excel求样本均值用到的函数是AVERAGE
A.
正确
B.
错误
【单选题】The idea of public works projects as a device to pr or control depression was designed as a means of creating job opportunities for unemployed workers and as a 'pump priming' device to aid busine...
A.
the work projects of the former were carded out by the Federal Government______
B.
the government subsidized private industry
C.
the number of unemployed was reduced
D.
the former was government's first attempt to end hardship due to unemployment
【单选题】将平面工件放在铣床工作台面上,还剩下一个轴的转动和( )个轴的移动的自由度未被限制。
A.
)二
B.
)一
C.
)三
D.
)四
【判断题】用excel求样本均值用到的函数是AVERAGE
A.
正确
B.
错误
【判断题】一个平面限制三个移动的自由度。
A.
正确
B.
错误
【简答题】One of the reasons why VCRs are so difficult to use is that ________. A) the designers are often insensitive to the operational complexities of their machines B) the range of features provided is unli...
【简答题】People are being invited to sit down to eat with their neighbors in a nationwide lunch party designed to promote community spirit. The Big Lunch is the idea of the Eden Project in Cornwall. It aims to...
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