常用于吸附水溶液中非极性色素的是()
A.阳离子交换树脂
B.透析膜
C.活性炭
D.硅胶
E.氧化铝
参考答案:C
礼宾次序亦称礼宾序列。它主要适用于在多边性商务交往中如何同时兼顾( )、平等待人这两项基本礼仪原则,处于实践中难以回避的顺序与位次的排列问题。
A.尊重个人
B.尊卑有序
C.各国平等
D.以右为尊
—She was late for the party.
—That's () she had forgotten the exact time.
A. why
B. how
C. because
D. whether