大促销海报主要设置在（）。
A、店外玻璃门上
B、货架，物品陈列处
C、收银台附近
D、泵岛上
参考答案：A, C, D
— Did you usually come to school by bike?
— _____. But I sometimes walked. [ ]
A. Yes, I didn't
B. No, I did
C. Yes, I did
D. No, I don't
在原子吸收光谱法中，测量的光谱是（）。
A.线状光谱
B.带状光谱
C.宽带光谱
D.连续光谱
E.任何一种均可
