在力法方程中，下列结论肯定出现的是：（） A.△i=0 B..△i>O C..△i

妊娠剧吐最初禁食至少()

A.6小时

B.48小时

C.12小时

D.24小时

E.96小时

_____ I toured Lushan Mountain, I was deeply impressed with its beautiful scenery. [ ]

A. The first time

B. For the first time

C. At first

D. It was the first time

Hurry up! Our friends ______ for us now.

A．wait

B．are waiting

C．will wait

D．have waited

Shortly after the book Uncle Tom's Cabin________, the Civil War of America________.

A．came about; broke away http

B．came out; broke out http:/

C．came on; broke up

D．came up; broke down

一公司准备搞一次开业五周年庆典活动。总经理考虑到公司目前经营状况，要求公关部经理拿出一个既经济又能达到预期效果的新闻报道方案。公关部经理召集全体公关人员开会讨论对策。小李主张用报纸报道，这样全面又省钱；小王认为还是电视广告生动直观。争论便如此展开了。公关部经理也陷于沉思之中……