铜锌合金的颜色酷似金的颜色，所以近来用铜锌合金制成的假金元宝欺骗行人的事件屡有发生。要检验市面上的金首饰是否为纯金或者真金，可取样品与一种试剂进行反应，根据现象即可判断，所取的试剂是
| A．硫酸 | B．“王水” | C．盐酸 | D．硝酸 |
相关试题
If you leave the club, you will not be_____back in .
| A．received | B．admitted | C．turned | D．moved |
What I need is_____ book that contains ______ABC of oil painting.
| A．a; 不填 | B．the; 不填 | C．the; an | D．a ; the |
Jenny nearly missed the flight______ doing too much shopping.
| A．as a result of | B．on top of | C．in front of | D．in need of |
The CDs are on sale! Buy one and you get ______ completely free.
| A．other | B．others | C．one | D．ones ks |
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