证券是指各类记载并代表一定权利的( )。
A.商品凭证 B.法律凭证 C.货币凭证 D.资本凭证
参考答案:B
下列图示实验操作中,错误的是[ ]
A.液体的倾倒
B.检验氧气是否集满
C.给液体加热
D.称取一定质量的NaOH
89. Was this piece of earthenware(陶器) made machine or _____ hand?
A.by; by
B.with; by
C.with; with
D.by; with