Which of the following is not a reason Mr. Wang gives for the fact that their prices are higher than others?
A. Their products have smoother surface.
B. Their manufacturing environment well meets the international sanitary standards.
C. Their delivery is faster than other companies.
查看答案
What is the maximum discount Mr. Wang can grant for the large plastic chair and the trolley?
A. 5%
B. 10%
C. 15%
At the beginning, Mr. Wang refused to give a 10% discount for the food box and cup container because __________?
A. the price of the raw material is on the steady rise
B. the quantity is not large enough
C. it's not their normal way of doing business
21.两个或多个事件在同一时间间隔内发生是指（）。
A. 并行性
B. 并发性
C. 同步
D. 互斥
18并发性是指若干事件在（）发生。
A. 同一时刻
B. 同一时间间隔内
C. 不同时刻
D. 不同时间间隔内
微信支付 
支付宝支付