水玻璃不能用于()用途。
A.封闭孑L隙的建筑涂料
B.防火涂料
C.配置专用的砂浆或混凝土
D.作为速凝剂掺合料
参考答案：B
— How long are you staying?
— I don't know. ________. [ ]
A. That's OK
B. Never mind
C. It depends
D. It doesn't matter
三棱针刺络法常取的腧穴是（）
A.曲泽、委中
B.肝俞、膈俞
C.合谷、太冲
D.列缺、照海
E.十宣、井穴
