【单选题】空气是常见的混合物,包含各种气体,气体的扩散是熵增自发的过程,但若将空气中的组分进行分离则是非自发的,现设空气中含氧 21% (体积),若在 25 °C 下将空气可逆分离成 95% (摩尔分数) O 2 的气氧和 99%N 2 的气氮,该分离的最小功为()。
【单选题】They took off their coats and went to the table near the window.
【简答题】they took off their clothes and there were no more (9)___________.
【单选题】企业经营活动的多个职能中,哪个职能为企业创造价值而成为企业利润源泉( )
【单选题】1992年甲乙签订了一份转让房屋协议,甲将自己三间破旧私房作价3万元转让给乙。乙居住一年,于1993年又将该房屋以3.5万元的价格转让给丙。丙居住一年,于1994年又将该房屋以4万元价格转让给丁。上述转让均未办理私房过户手续。1995年由于该市将该房地段划为开发区,致使该房价格涨至15万元。因前述转让均未办理过户手续,甲、乙、丙、丁4人为房屋所有权发生争议,现问该房屋应归()所有。
【单选题】课本图9-12两圆柱正交相贯,属于实体与虚体相贯的是:
【单选题】Which of the following is NOT mentioned as a reason for the woman to go to the clinic for a check-up?
A.
She can't see clearly in the distance.
C.
She can't see well when she reads.
D.
She is bothered by her eyes at night.
【单选题】35,企业经营活动的多个职能中,哪个职能为企业创造价值而成为企业利润源泉?()
【单选题】从事( )工作的人员不需要取得会计从业资格。