新房中最厉害的“空气杀手”是()
A、二氧化碳
B、颗粒物
C、粉尘
D、氡
参考答案:D
—So you missed the lecture given by the famous professor.
—____________. I got there 10 minutes before it finished.
A.Not at all
B.Not exactly
C.Not really
D.Not likely
在企业系统规划方法的最后,应该对优先子系统建立______,以便管理人员对其进行评价。