The failure of Tu’s test on artemisia is that the temperature is low.
查看答案
The result of the experiment was very good, when the team tested the drug on animals.
A. 对
B. 错
Knowing what was at state, Tu volunteered to test the drug on herself.
A. 对
B. 错
有四个数字：1、2、3、4，能组成多少个互不相同且无重复数字的三位数？用代码实现
变动生产成本不包括以下哪个选项。（）
A. 直接人工
B. 直接材料
C. 固定制造费用
D. 变动性制造费用
微信支付 
支付宝支付