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【单选题】
细胞的胞质中,Na和K平时相对胞外,保持A.
浓度相等
B.
[Na]高,[K]低
C.
[Na]低,[K]高
D.
[Na]是[K]的3倍
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【简答题】某公司 2008年只经营一种产品,息税前利润总额为90万元,变动成本率为40%,债务筹资的利息为40万元,单位变动成本100元,销售数量10000台,预计2009年息税前利润会增加10%。 要求:( 1)计算该公司2009年的经营杠杆系数、财务杠杆系数、总杠杆系数。 ( 2)预计2009年该公司的每股收益增长率?
【简答题】A．They will leave as soon as the course is over. B．They will leave on the 13th. C．They will leave on the 14th. D．They will leave on Monday—the 15th.
【单选题】Let us _____ hands with them because they will leave here for the Tower Bridge next Saturday. [ ]
A.
shake
B.
help
C.
wash
D.
give
【简答题】A．Because they have signed a very important contract. B．Because they will leave early tomorrow. C．Because they have got a good night's sleep. D．Because they have received good service from the hotel.
【简答题】When does the man think they will leave．9
【单选题】As we all know, independence is very ________ for youngsters because sooner or later they will leave their families and live alone.
A.
essential
B.
accurate
C.
flexible
D.
temporary
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