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【单选题】
Whether you can accomplish a specific goal or meet a specific deadline depends first on how much time you need to get the job done. What should you do when the demands of the job exceed the time you have available? The best approach is to divide the project into smaller pieces. Different goals will have to be divided in different ways, but one seemingly unrealistic goal can often be accomplished by working on several smaller, more reasonable goals. 8. The main idea of the passage is that _________.
A.
jobs often remain only partially completed because of lack of time.
B.
the best way to complete projects is to make sure your goals are achievable.
C.
the best way to tackle a large project is to separate it into smaller parts.
D.
the best approach to a demanding job is to delegate responsibility.
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举一反三
【简答题】液体在管道中存在两种流动状态:__________、__________,液体的流动状态可用__________来判断。
【简答题】某管道内径为0.2m,液体流量为2m/s,求该液体在管道内的流速。
【单选题】在水击研究中,必须认为________。 ( )
A.
液体是可压缩的,管道是刚体
B.
液体是不可压缩的,管道是弹性体
C.
液体和管道都是弹性体
D.
液体是不可压缩的,管道是刚体
【多选题】液体在管道中存在 和 两种流动状态。
A.
层流
B.
平滑流
C.
紊流
D.
稳流
【简答题】平面任意力系中,若主失为零,主矩也为零,则原力系为__________。
【多选题】按公安情报的内容以及所起的作用,可分为?
A.
公开情报
B.
战略情报
C.
战术性情报
D.
秘密情报
E.
静态情报
F.
动态情报
【单选题】解除外力后,消失的变形和遗留的变形( )。
A.
分别称为弹性变形、塑性变形
B.
统称为塑性变形
C.
分别称为塑性变形、弹性变形
D.
统称为弹性变形
【简答题】某液体在直径为0.2m的管道内的流速为63.69m/s,求该液体在管道中每秒流量。
【判断题】若浮点数的尾数用补码表示,那么规格化的浮点数是指尾数数值位的最高位是0(正数)或是1(负数)。
A.
正确
B.
错误
【简答题】某液体在直径为1m的管道内的流速为20m/s,求该液体在管道中的每秒流量。
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