皮皮学，免费搜题
登录
搜题
【单选题】
下列操作中不正确的是（ ）A.
过滤时，玻璃棒与三层滤纸的一边接触。
B.
过滤时，漏斗下端紧贴烧杯内壁。
C.
加热试管内物质时，试管底部与酒精灯灯芯接触。
D.
向试管中滴加液体时，胶头滴管不能紧贴试管内壁。
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】Richard, King of England from 1189 to 1199, with all his characteristic virtues and faults cast in a heroic mould, is one of the most fascinating medieval figures. He has been described as the creatur...
A.
paid few taxes to him
B.
gave him little respect
C.
received little protection from him
D.
had no real cause to feel grateful to him
【简答题】1199乘a的积的末尾有______个9．
参考解析：
知识点：
题目纠错 0
发布
