要除去KCl中混有的少量K2CO3,选用的试剂是[ ]
A.H2SO4溶液
B.稀盐酸
C.K2SO4溶液
D.AgNO3溶液
答案:B
PART ONE Question 1-8 · For questions 1-8 you will hear eight short recordings. · For each question, mark one letter (A, B or C) for the correct answer.
When will this be delivered
下列哪种公共收入形式的代价较大()
A.税收
B.收费
C.增发货币
D.公债