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【判断题】
离心泵停车时，先关闭泵的出口阀门，以避免压出管内的液体倒流。A.
正确
B.
错误
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举一反三
【简答题】小明看到班级中椅子有一些被损坏了,同学坐时直摇晃,他就利用周六的休息时间拿来板条进行维修,观察图,指出他运用了什么数学知识.
【简答题】( 9 分) 某农艺师研究了植物生长调节剂 ABT 对小果油茶插条生根的影响,预实验结果如右图所示。请根据预实验结果,设计实验进一步探究 ABT 促进小果油茶插条生根的最适浓度。 ( 1 )实验步骤 1 配制浓度分别为 __________ 的 ABT 溶液。(溶液浓度梯度差为 50mg•L -1 ) 2 取制备好的小果油茶枝条若干, __________ ,然后扦插。 3 一段时间后进行观察。 ...
【简答题】某农艺师研究了植物生长调节剂ABT对小果油茶插条生根的影响,预实验结果如右图所示。请根据预实验结果,设计实验进一步探究ABT促进小果油茶插条生根的最适浓度。 /(1)实验步骤 1配制浓度分别为__________的ABT溶液。(溶液浓度梯度差为50mg•L -1 ) 2取制备好的小果油茶枝条若干,__________,然后扦插。 3一段时间后进行观察。 ( 2) 请设计一个表格用于记录实验结果。 ...
【单选题】The designer window treatments in her house, installed 17 years ago, were outmoded .
A.
unnecessary
B.
pointless
C.
out-of-date
D.
worthless
【单选题】You are the desktop administrator for Contoso, Ltd. A graphic designer named Peter saves all his files in the My Documents folder on his Window XP Professional computer. Peter now needs to work on sev...
A.
Change the UNC path of Peter’s roaming profile to his home directory folder.
B.
Log on as a local administrator on Peter’s computer. Change the roaming profile to a local profile.
C.
Log on as a local administrator on Peter’s computer. Edit the local Group Policy to exclude Directories in Roaming Profile.
D.
Log on as a local administrator on Peter’s computer. In the properties of the My Documents folder, change the Target folder location to Peter’s home directory.
【简答题】听力原文：M: Okay, I just want to update you on our main plans for promotion this autumn. The main campaign will of course be the pocket dictionary, but we also have a reasonable budget for the new road ma...
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