离子交换树脂能是一种[ ]
A.非电解质
B.有机高分子电解质
C.易溶于水的物质
D.在溶液中能与异性离子交换的电解质
答案:B
—Hi, Mr. Smith. Which department do you work in?
—I am in the Marketing Department now, but I ________ in the Sales Department before long.
A.worked
B.will work
C.have worked
D.will have worked
夹心式报价方式适合较低的低档次客房,突出物美价廉,对客人造成吸引力。