① —Who is she?
—She's my teacher,Miss Fang.
②—Who is she?
—She's my teacher,Mrs Wang.
③—Who is he?
—He's my teacher,Mr Zhang.
④—Who is he?
—He's my teacher,Mr Liu.
____
写出下列单词的对应词。
① new ____
② tall ____
③ big ____
①人的胃液里含有少量盐酸.
②可溶性钡盐会使人中毒.
试回答:透视检查胃病时,让患者口服硫酸钡是否会使人中毒?____
能否用碳酸钡代替硫酸钡?____原因是____.