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问题
单项选择题
医学道德评价的方式有
A．内心信念
B．社会舆论
C．传统习俗
D．以上都是
E．以上都不是
答案
参考答案：D
选择题
In ________, he began to learn Russian, when he was in ________.
A. 1970; the 50's
B. the 1970; his 50s
C. the 1970s; his fifties
D. 1970s; his fifties
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填空题
计算x
5
·
x
3
·
x
2
=（ ）．
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