【多选题】伏暑发病季节有秋冬尽早之不同,因而又称()
【多选题】伏暑发病季节有秋冬尽早之不同,因而又称( )。 【多选】
【单选题】P58.若要调整产品的价格是,下列的查询方法中最便利的方式是
【单选题】Menu costs of inflation are the:
A.
costs associated with money not being a reliable unit of measurement.
B.
costs of transactions associated with avoiding the inflation tax.
C.
costs associated with businesses changing prices.
D.
revenue the government gets from printing money.
【单选题】光的散射现象可用于鉴别溶胶系统与高分子溶液,因为( )。
A.
溶胶有明显的相界面,光折射率大;而高分子真溶液为均相系统,折射率小,散射光弱。