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【单选题】
已知var x=10,y=20,z=30;,以下语句执行后x,y,z的值是( )。 if(x>y) z=x; x=y; y=z;A.
10,20,30
B.
20,30,20
C.
20,30,10
D.
20,30,30
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【单选题】According to the text．which of the following is NOT true?
A.
Soil forms from weathered rock on the earth surface．
B.
The deeper layer of soil is darker in colour than t}le surface soil．
C.
Air pollution is partially responsible for acid soil．
D.
Groundwater tends to carry away nutrients for plant growth．
【简答题】● (66) is a channel's capacity which directly reflects the data transfer rate of the channel. (67) functions in a NetWare network which is used to define addressing schemes. (68) is a network layer de...
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