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【单选题】
下列（）元件可以做电动机的短路保护。A.
保险丝
B.
热继电器
C.
电阻
D.
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举一反三
【单选题】单元测试一音频Why does the man need the woman's assistance?
A.
He wants to know how to borrow the videos from the library.
B.
He wants to know the location of the library’s video collection.
C.
He wants to know how to find out where the play is currently being performed.
D.
He wants to know where to find the old newspaper reviews about a play.
【单选题】下列反应的平衡常数 ：C(s)+O 2 (g)====CO 2 (g)为 ，2CO(s)+O 2 (g)====2CO 2 (g)为 ，C(s)+(1/2)O 2 (g)=CO(g)为 ，则三个平衡常数之间的关系为( )。
A.
B.
C.
【单选题】Why does the student go to the woman's office?
A.
To schedule an audition to join an archestra
B.
To ask a question about a music class he is taking
C.
To get information for an article he is writing
D.
To ask a question about a lecture the woman gave
【简答题】Why does the man offer a lift? [A] Because the woman's home is on his way home. [B] Because the driver is always willing to help others. [C] Because the driver is going home right now. [D] Because the...
【单选题】Why does the man say this:
A.
To suggest a course of action for solving the woman's problem.
B.
To express frustration that the woman is unfamiliar with the library.
C.
To let the woman know who will be available to help her in the library.
D.
To indicate that he does not have time to assist the woman now.
【单选题】298K时，下列反应中， 的为( )。
A.
B.
C(s)+O 2 (g)====CO 2 (g)
C.
CO 2 (g)+C(s)====2CO(g)
D.
C(s)+H 2 O(g)====CO(g)+H 2 (g)
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