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【单选题】
x为系统的一个状态函数,则不正确的是:A.
dx 为全微分
B.
当状态确定，x的值确定
C.
∆x =∫dx 的积分与路径无关，只与始终态有关
D.
当系统状态变化时，x值一定变化
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反馈参考答案：
举一反三
【单选题】农产品因受自然条件的影响较大,难以用文字说明,所以确定其品质的方法是( )
A.
看货买卖
B.
凭样品成交
C.
凭规格买卖
D.
看 凭等级买卖 《国际贸易合同条款》练习题附参考答案
【单选题】Today’s shopping mall has as its antecedents his¬torical marketplaces, such as Greek agoras, Euro¬pean piazzas, and Asian bazaars. The purpose of these sites, as with the shopping mall, is both eco¬no...
A.
modern Americans spend an average of 15 hours a month in shopping malls.
B.
shopping malls serve an important purpose in our culture.
C.
shopping malls have a social as well as commercial function.
D.
there are historical antecedents for almost everything in contemporary society.
【单选题】The insulted young man decided to take ______ on his boss by burning ¬¬all the important files.
A.
accuse
B.
charge
C.
challenge
D.
revenge
【单选题】It weighs less than three pounds and is hardly more interesting to look at than an overly ripe cauliflower. ___________________________________________. It has created poetry and music, planned and ex...
A.
The human brain is made of gelatinous matter and contains no nerve endings.
B.
The science of neurology has found a way to map the most important areas of the human brain.
C.
Nevertheless, the human brain is the most mysterious and complex object on Earth.
D.
However, scientists say that each person uses only 10% of his or her brain over the course of a lifetime!
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