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【单选题】
一项工程,甲单独做10天完成,乙单独做要15天完成任务,丙单独做要12天完成任务,现在三人合作,几天可以完成任务?( )。
A.
4
B.
5
C.
6
D.
7
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参考答案:
举一反三
【简答题】阅读理解。 There are many things we need to know, but we do not learn them at school. For example, if we want to use our money wisely, we need to shop carefully. We need to know how to compare (比较) the pri...
【简答题】化学防治的优缺点有哪些?
【单选题】[2017单选题]29.在PowerPoint2010中,下列说法错误的是______________。
A.
不可以为剪贴画重新上色
B.
可以向已存在的幻灯片中插人剪贴画
C.
可以修改剪贴画
D.
可以利用自动版式建立带剪贴画的幻灯片,用来插入剪贴画
【单选题】To recognize our circadian patterns, how many times do we need to take our temperature throughout the day?
A.
Five times at regular intervals.
B.
Three times at regular intervals.
C.
Six times at regular intervals.
D.
Seven times at regular intervals.
【单选题】If we need to add a "φ" for a dimension, what do we need to input?
A.
%%c
B.
%%p
C.
%%d
D.
%%x
【简答题】Ruth is good at music.29. Ruth is good at music.
【简答题】化学防治的优缺点有哪些?
【单选题】To calculate radius of investigation,which two parameters' relationship we need to seek?
A.
r,c1
B.
r,P
C.
r,Pi
D.
r,t
【简答题】Frank and Dale are friends.29. Frank and Dale are friends.
【简答题】According to the report, the North American health market (grow) ________ at a rate of about 7.4% in 2017.
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