气相色谱为法测定氯苯时，萃取溶剂二硫化碳中若含有杂质，需经纯化处理。
参考答案：对
为推进祖国和平统一进程、反对和遏制“台独”分裂势力，十届全国人大三次会议审议通过什么法律？
Jack has had no ________experience of this kind of job，but he got the job offer just due to his honesty.
A．previous
B．obvious
C．cautious
D．precious
