为什么碱类具有相似的化学性质?
参考答案:
由于碱类在水溶液中都能电离出氢氧根离子,所以碱类具有相似的化学性质.
治疗晕厥的主穴,不包括()。
A.水沟
B.中冲
C.太冲
D.涌泉
E.足三里
—What do you think of the music teacher?
—________ she is an elegant lady, she can be extremely difficult to work with. [ ]
A. Even if
B. As
C. Because
D. While