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【单选题】
在稳定流动系统中，粗管连续地流入细管,若粗管直径是细管的2倍，则细管流速是粗管的()倍。A.
2
B.
8
C.
4
D.
3
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【单选题】以下程序段的输出结果是（）。int x=10, y=10;cout<
A.
10,9
B.
9,10
C.
10,10
D.
9,9
【单选题】以下程序段的输出结果是( )。 int x=10,y=10 ; printf(“%d %d\n”, x --,--y) ;
A.
10 10
B.
10 9
C.
9 10
D.
9 9
【简答题】Sleep is something we all do. But some people need to sleep more than others. Babies sleep most of the time. Children in school sleep about ten to twelve hours a night. Most grown-ups sleep only seven...
【单选题】以下程序段的输出结果是( )。 int x=10, y=10; printf("%d %d\n", x--, --y);
A.
10 10
B.
9 9
C.
9 10
D.
10 9
【简答题】根据短文内容，判断正（T）误（F）。 How much sleep do we need? We are all different. Some people need only three or four hours of sleep a night. Others need ten hours of sleep a night. Most Americans sleep an average ...
【简答题】完形填空。 How much sleep do we need? We are all different. Some people need only three hours of sleep a night. 1 need ten hours of sleep a night. After age fifty, the average (平均) sleep time goes 2 to 6....
【简答题】阅读理解。 How much sleep do we need? We are all different. Some people need only three hours of sleep a night. Others need ten hours of sleep a night. Most Americans sleep an average (平均值) of seven to eig...
【单选题】Although we are not sure why we sleep, there is no doubt ______ we need to do so.
A.
whether
B.
why
C.
what
D.
that
相关题目：
【单选题】以下程序段的输出结果是（）。int x=10, y=10;cout<
A.
10,9
B.
9,10
C.
10,10
D.
9,9