---Excuse me. Is this Mr. Brown's office?----I'm sorry, but Mr. Brown______ works here. He left about three weeks ago.
A. not now
B. no more
C. not still
D. no longer
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The bigger the apple is, ________ the price is.
A. the higher
B. higher
C. the highest
D. highest
组分A与组分B形成液相完全互溶系统,在一定温度下,若纯B的饱和蒸气压大于纯A的饱和蒸气压,当此系统处于气液平衡时,则()。
A. yB>xB
B. yB<xB
C. yB=xB
D. ABC都有可能
1mol单原子理想气体,从300K、100Kpa,经PT=常数的可逆途径压缩到200Kpa的终态,该过程的ΔUJ(数值取整)
胰腺癌的好发部位是
A. 胰头
B. 胰体
C. 胰尾
D. 胰颈
E. 弥漫生长