呼吸衰竭最早出现的症状是________。

I can't go home now. A lot of work ______ to be done. [ ]

A. have

B. is remained

C. left

D. remains

根据财政部和中国证券监督管理委员会发布的《证券结算风险基金管理办法》，证券结算风险基金总额上限为（）。

A.10亿元

B.20亿元

C.30亿元

D.50亿元

Double Eagle II, the first trans-Atlantic balloon, was greeted by avid crowds in France.

A．eager

B．surging

C．appreciative

D．vigorous

列入精神药品第一类品种目录的是（）

A.消旋麻黄素

B.马吲哚

C.复方樟脑酊

D.麦角胺咖啡因片

It was（）of you not to play the piano while I was having a sleep.

A.considerate

B.careful

C.considering

D.considerable