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【单选题】
已知等差数列24,21,18,......此等差数列的第四: ( )A.
17
B.
16
C.
15
D.
14
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反馈参考答案：
举一反三
【简答题】夹钳式取料手由手爪和驱动机构、（ ）及连接与支撑元件组成。
【单选题】关于反馈,下列说法正确的是
A.
反馈只需要告诉学生是否达到了学习目标
B.
反馈的重点在于指出学生的错误
C.
无论是课堂质疑的反馈,还是课后练习的反馈其作用都是一样的
D.
反馈一定要及时
【单选题】Mason says, “I don’t see why not.” What does he mean?
A.
Mason says, “I don’t see why not.” What does he mean?
B.
I don’t think so.
C.
I wonder what you said is true.
D.
I definitely think so.
【单选题】Why does the man want to exchange the sweater?
A.
It doesn't tit him and the color isn't satisfactory.
B.
It is a birthday present from his friend.
C.
He has got the receipt.
【单选题】Why does the professor say this:
A.
To explain why only icebreakers can cross the passage
B.
To show the difference between ice in winter and summer
C.
To illustrate changes in the ice covering the Arctic region
D.
To describe the dimensions of an average iceberg
【简答题】夹钳式取料手由 () 和驱动机构、 ()及连接与支撑元件组成
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