刘晓是某社会服务机构新录用的社会工作者，机构安排了老李做刘晓的督导。老李每次对刘晓进

We traveled all night to London and got there _______ Sunday morning. [ ]

A. for

B. on

C. at

D. to

Which of the following is least likely to be classified as an opportunity cost()

A. The cash savings related to adopting a new production process.

B. The cash flows generated by an old machine that is to be replaced.

C. The market value of vacant land to be used for a distribution center.

气候系统与全球变化研究包括研究气候变化导致的（）。

A.农业病虫害

B.全球或区域水循环变化

C.全球或区域碳循环变化

D.寄生虫病以及病毒的变异与传播

我国刑法修正案八中加大了对醉驾的处罚力度，醉驾之所以易发生事故是因为抑制了（）功能。

A.神经系统

B.运动系统

C.循环系统

D.泌尿系统