【单选题】离子交换树脂去除硬度的原理是,通过离子交换树脂上可用来交换的( )离子,把水中的( )离子交换上去,置换下来离子交换树脂上原有的这些可活动可交换的阳离子到溶液中,正确选项为( )
【多选题】古典犯罪学派所提出的预防犯罪思想,大致可以归纳为以下( )几点。
【单选题】Covered interest arbitrage moves the market __________ equilibrium because __________.
A.
toward; investors are now more willing to invest in risky securities
B.
toward; purchasing a currency on the spot market and selling in the forward market narrows the differential between the two
C.
away from; purchasing a currency on the spot market and selling in the forward market increases the differential between the two
D.
away from; demand for the stronger currency forces up the interest rates on the weaker security
【单选题】Covered interest arbitrage moves the market ________ equilibrium because ________.
A.
toward; purchasing a currency on the spot market and selling in the forward market narrows the differential between the two
B.
toward; investors are now more willing to invest in risky securities
C.
away from; purchasing a currency on the spot market and selling in the forward market increases the differential between the two
D.
away from; demand for the stronger currency forces up interest rates on the weaker security
【判断题】人体工程学中的机仅指人操作或使用的机器设备。
【多选题】关于 I 型超敏反应的特点正确的是( )
【单选题】离子交换法是净化处理原水的基本方法之一,下列有关此方法叙述错误的是()
B.
主要是通过离子交换树脂完成的,常用的为钠型和氯型两种树脂
C.
原水通过离子交换树脂柱的先后顺序为阴床、阳床、混合床
【单选题】Information is distorted as it moves within the supply chain because
A.
complete information is shared between stages.
B.
complete information is not shared between stages
C.
firms try to be too accurate.