《本草衍义》中对精制砒霜过程有如下叙述:“取砒之法,将生砒就置火上,以器覆之,令砒烟上飞着覆器,遂凝结累然下垂如乳,尖长者为胜,平短者次之。”文中涉及的操作方法是( ) A . 蒸馏 B . 升华 C . 分液 D . 过滤 答案:B
Read and choose. (找出下面单词的画线部分发音与其他不同的一项)
( )1. A. cool ( )2. A. twist ( )3. A. grandma ( )4. A. come ( )5. A. who
B. house B. train B. father B. fine B. hello
C. gooseC. try C. grandpa C. game C. clothes
D. schoolD. treeD. thankD. letter D. go