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【单选题】
Every time the author heard the advice of having a good attitude, he was annoyed because .A.
he had to deal with big problems
B.
he was not able to get a good attitude
C.
life seemed easy for everyone including himself
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反馈参考答案：
举一反三
【单选题】某化妆品厂受托加工一批化妆品，委托方提供原材料成本35万元。该厂收取加工费12万元、代垫辅助材料款2.5万元，该厂没有同类化妆品销售价格，该厂应代收代缴消费税( )元。（以上款项均不含增值税）
A.
21.21
B.
19.71
C.
20.86
D.
22.00
【单选题】若某种有毒物质近似正态分布,确定95%医学参考值范围时,就按式来计算()
A.
-2.33s
B.
±1.96s
C.
+1.64s
D.
-1.64s
E.
+2.33s
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