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【简答题】
请打开“第四周课程.ppt” 文件和文件夹共享 (1)选择想要打开共享的文件夹并_____,选择快捷菜单中的“属性”命令。 (2)在打开的“属性”对话框中,切换到“_________”选项卡,单击“网络文件和文件夹共享”区域的“共享”按钮。 (3)在打开“文件共享”窗口后,添加运行访问的用户,可以选择 __________,并设置权限。 (4)此时将提示“你的文件夹已共享”,即以实现文件共享功能。
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【简答题】As to the greenhouse effect，the author_____
【简答题】生物药物在生产、制备中的特殊性有哪些?
【单选题】Greenhouse Effect A greenhouse is a building made of glass which is used for keeping plants warm when the outside temperature is low. In a similar way, there are several gases in the atmosphere which ...
A.
keep the plants warm.
B.
prevent air pollution.
C.
stop the greenhouse effect.
D.
produce useful gases.
【单选题】The greenhouse effect ______________________.
A.
is decreasing overtime and so is not an issue that scientists take seriously
B.
is clearly a negative phenomenon because it heats up the earth's temperature
C.
can be a positive phenomenon because it keeps the earth's temperature from being too low for life to exist, but can also be a negative phenomenon when too much greenhouse gas is stored in the atmosphere
D.
is clearly a positive phenomenon because without the greenhouse gases, the earth's temperature would be too cold for life
【简答题】If there were no greenhouse effect， ．
【单选题】According to the passage, which of the following is NOT TRUE about the greenhouse effect_______.
A.
Most of the greenhouse effect is caused by watr vapor in the atmosphere.
B.
Human beings hve little to do with the amount of water vapor in the atmosphere, thus playing no role in the greenhouse effect.
C.
Nitrous oxide also belongs to greenhouse gases which cause greenhouse effect.
D.
Without our atmosphere, there would be no greenhouse effect.
【简答题】The most abundant greenhouse gases are ______and______.
【简答题】The increase of greenhouse gases______________
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