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【简答题】
在一半径R=1.0cm的无限长半圆筒形金属薄片中，沿长度方向有横截面上均匀分布的电流I=5.0A通过．试求圆柱轴线任一点的磁感强度．(μ 0 =4π×10 -7 N/A 2 )
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举一反三
【单选题】public class X implements Runnable （ private int x； private int y； public static void main（String [] args） （ X that = new X（）； （new Thread（that）） . start（ ）； （new Thread（that）） . start（ ）； ） p...
A.
An error at line 11 causes compilation to fail.
B.
Errors at lines 7 and 8 cause compilation to fail.
C.
The program prints pairs of values for x and y that might not always be the same on the same line （for example， “x=2， y=1”）
D.
The program prints pairs of values for x and y that are always the same on the same line （for example， “x=1， y=1”. In addition， each value appears twice （for example， “x=1， y=1” followed by “x=1， y=1”）
E.
The program prints pairs of values for x and y that are always the same on the same line （for example， “x=1， y=1”. In addition， each value appears twice （for example， “x=1， y=1” followed by “x=2s， y=2”）
【单选题】public class X implements Runnable（ private int x； private int y； public static void main（Stringargs） X that = new X（）； （new Thread（that））.start（）； （new Thread（that））.start（）； ） public vo...
A.
Errors at lines 7 and 8 cause compilation to fail.
B.
The program prints pairs of values for x and y that might not always be the same on the same line （for example， “x=2， y=1”）.
C.
The program prints pairs of values for x and y that are always the same on the same line （for example， “x=1， y=1”. In addition， each value appears twice （for example， “x=1， y=1” followed by “x=1， y=1”）.
D.
The program prints pairs of values for x and y that are always the same on the same line （for example， “x=1， y=1”. In addition， each value appears only for once （for example， “x=1， y=1” followed by “x=2， y=2”）.
【单选题】As a new graduate, he doesn’t know _______ it takes to start a new business.
A.
how
B.
what
C.
when
D.
which
【简答题】德育个体性功能的最高境界是享用性功能。（ ）
【简答题】德育个体性功能的最高境界是享用性功能。（ ）
【单选题】_____ of the new aircraft will start next year.
A.
produce
B.
production
C.
product
D.
productive
【单选题】由于社区物理环境与医院物理环境有很大差别,特别是当涉及到去病人家中访视时,要求教师具有良好的
A.
护理实践能力
B.
管理能力
C.
人际交往能力和沟通技巧
D.
科研能力
【单选题】public class X implements Runnable { private int x； private int y； public static void main（String [] args） { X that = new X（）； （new Thread（ that ））.start（）； （new Thread（ that ））.start（）； } pub...
A.
Compilation fails.
B.
The program prints pairs of values for x and y that might not always be the same on the same line （for example， “x = 2， y = 1”）.
C.
The program prints pairs of values for x and y that are always the same on the same line （for example， “x = 1， y = 1”）. In addition， each value appears only once （for example， “x = 1， y = 1” followed by “x = 2， y = 2”）. The thread name at the start of the line shows that both threads are executing concurrently.
D.
The program prints pairs of values for x and y that are always the same on the same line （for example， “x = 1， y = 1”）. In addition， each value appears only once （for example， “x = 1， y = 1” followed by “x = 2， y = 2”）. The thread name at the start of the line shows that only a single thread is actually executing.
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