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【单选题】
关于磁感线下列说法中正确的是 ................................................( )A.
磁感线是实际存在于磁场中的曲线
B.
磁铁的磁感线是从N极出发到S极终止的曲线
C.
匀强磁场的磁感线是间距相等且相互平行的直线
D.
磁场中的两条磁感线有可能相交
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皮皮学刷刷变学霸
举一反三
【单选题】In the author's opinion, ______
A.
American young couples have no chance to show their individualism in their marriage
B.
American young couples doll' t like to following long-held traditions
C.
American young couples are inclined to follow the marriage traditions
D.
American young couples marry in their own way
【单选题】In the author' s opinion ______.
A.
American young couples have no chance to show their individualism in their marriage
B.
American young couples don' t like to follow long-held traditions
C.
American young couples are inclined to follow the marriage traditions
D.
American young couples marry in their own way
【简答题】广域网专线方式用户独占一条( )和 ( )专用线路。
【单选题】Two American couples each ___ a Chinese girl and they happen to be twin sisters.
A.
have adapted
B.
has brought up
C.
has received
D.
have adopted
【单选题】以下变量均为整型,则值不等于5的表达式是()。
A.
x=y=4,x+1,y+1
B.
x=y=3,x+y,y+2
C.
x=5,x+1,y=5,y
D.
y=5,y+1,x=y,x+1
【单选题】关于Java语言的描述，错误的是（ ）。
A.
一个.java源文件中可以有多个类，但只能有一个主类
B.
线程执行的主体是run( )方法
C.
main( )方法是Java应用程序的入口
D.
Java Application只能输出图形界面
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