来源于葫芦科植物的药材是()
A.瓜蒌
B.地肤子
C.枸杞子
D.槟榔
E.砂仁
参考答案:A
现有60瓶矿泉水,编号从1到60,若用系统抽样的方法从中抽取6瓶进行检验,则所抽取的编号可能为 ( )
A.3,13,23,33,43,53
B.2,14,26,38,40,52
C.5,8,31,36,48,54
D.5,10,15,20,25,30
According to the rules and regulations, all payments _____ be made in cash in the shopping center.
A.shall
B.can
C.must
D.should