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【单选题】
渗碳钢一般为 。A.
铸铁
B.
中碳钢
C.
高碳钢
D.
低碳钢
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反馈参考答案：
举一反三
【简答题】心理定价策略是指针对购买者的心理特点而采取的一种定价策略，以下方法中不属于这类定价策略的是（ ）。
【单选题】It is better for a teacher to indicate locations of errors in students' papers than to correct them because of the following reasons except that______.
A.
the teacher may misread the students'intentions
B.
to indicate error locations is less time consuming
C.
indication of errors has the same effects on students as the correction of errors
D.
to correct students' errors can make students lose face
【单选题】The teacher, along with 5 of her students, ________talking with a foreign teacher in the English Corner at that time.
A.
was
B.
were
C.
had been
D.
would be
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