在用古蔡法检查砷盐时，导气管中塞入醋酸铅棉花的目的是
A．除去I2B．除去AsH3C．除去H2SD．除去HBrE．除去SbH3
参考答案：C
用所给词的适当形式填空。
1. Best______ (wish) for you.
2. Would you like ______ (have) some coffee?
3. I'm going to have a ______ (swim) lesson.
4. The price of the MP4 ______ (be) 500 yuan.
5. The Lion King is on at New ______ (time) Cinema.
在记账凭证编制的基本要求中规定，发现以前年度记账凭证有错误的，应当用蓝字填制一张更正的记账凭证。
