【简答题】1mol,101.3kPa,0℃的理想气体经以下三步组成一个循环过程:(1)等容加热到T 2 ,使T 2 =2T 1 ;(2)绝热可逆膨胀到T 3 ,使T 3 =T 1 ;(3)等温可逆压缩回到始态。试计算每步及整个循环过程的Q,W,△U和△H。已知C v,m =5R/2。
【多选题】下列几种情形下企业会面临外汇风险的有
B.
企业对外收支都使用外币,并且,币种相同,金额相同和时间相同
D.
企业 在不同时间收支币种不同、金额也不同的外汇
【单选题】Who is the speaker probably talking to?
A.
Library science students.
B.
Students who are interested in a attending this college.
C.
Librarians who want to know about the library collection.
D.
Students who will be graduating from the college soon.
【单选题】现代旅游中,就目的性来说,占绝对优势的是( )
【判断题】拥有外汇多头头寸的企业将面临外汇贬值的风险,而拥有外汇空头头寸的企业将面临外汇升值的风险。()
【单选题】Average students who work hard usually do better than clever students who are _________.
【判断题】拥有外汇多头头寸的企业将面临外汇贬值的风险,而拥有外汇空头头寸的企业将面临外汇升值的风险。