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【多选题】
下列机构中不具备急回特性的是 ( )A.
曲柄摇杆机构
B.
双曲柄机构
C.
对心式曲柄滑块机构
D.
摆动 导杆机构
E.
偏置式曲柄滑块机构
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反馈参考答案：
举一反三
【单选题】Given: public class Test { public static void main (String args[]) { class Foo { public int i = 3; } Object o = (Object) new Foo(); Foo foo = (Foo)o; System.out.println(foo.i); } } What is the result?
A.
Compilation will fail.
B.
Compilation will succeed and the program will print “3”
C.
Compilation will succeed but the program will throw a ClassCastException at line 6.
D.
Compilation will succeed but the program will throw a ClassCastException at line 7.
【单选题】Given： What is the result？（）
A.
An exception is thrown at runtime.
B.
r， e， o，
C.
Compilation fails.
D.
r， t， t，
【单选题】Listen to a lecture about Internet Use in Britain and take notes. Use your notes to complete the statements below. Circle A, B or C III.NGeneration InUsers5m38s.mp3: The next generation users create c...
A.
20%
B.
30%
C.
12%
【单选题】________ your report, what is most important to protect our environment ?
A.
As a result of
B.
Because of
C.
With the help of
D.
According to
【单选题】People who often stay up late are _________ to suffer from heart attacks than those who are not.
A.
six times more likely
B.
as likely six times
C.
six times as likely
D.
more likely six times
【单选题】What is the result？（）
A.
r， t， t，
B.
r， e， o，
C.
Compilation fails.
D.
An exception is thrown at runtime.
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