George Mallory was an English teacher _______ loved climbing.
A.who
B.whom
C.he
D.which
答案:A
用0.102 6 mol/L的盐酸滴定25.00 mL未知浓度的氢氧化钠溶液,滴定达终点时,滴定管中的液面如下图所示,正确的读数为
A.22.30 mL
B.22.35 mL
C.23.65 mL
D.23.70 mL
0.5×1/3÷(1/2÷1/3)等于()
A.1/9
B.1/4
C.1
D.3/2