搜题请搜索小程序“爱下问搜题”
问题 单项选择题

某城市的居民对高层住宅经历了一个从较为抗拒到较普遍接受的过程，这一现象反映了消费者市场的(　　)。

A．替代性

B．发展性

C．地区性

D．复杂性

答案

参考答案：B

单项选择题 A1/A2型题

女性，35岁。二尖瓣狭窄，当失代偿期发生时，最初的症状是（）

A.咯血

B.腹痛

C.晕厥

D.心绞痛

E.劳力性呼吸困难
查看答案
单项选择题

You are trying to determine what cost and schedule trade-off will be most appropriate for your project. You have the option to select either a more experienced person at $120 per hour who can do the task in 45 days or a less experienced person at $80 per hour who can do the same task in 65 days. A tool you can use to facilitate making the decision is ______ .

A．cost of quality

B．cause-and-effect diagram

C．design of experiments

D．network diagrams
查看答案