《中国药典》(2000版)采用白田道夫法检查砷盐的药物是
A．葡萄糖酸锑钠B．三硅酸镁C．山梨醇D．升华硫E．对氨基水杨酸钠
参考答案：A
Of all the students in our class. Betty writes _____.[ ]
A. very carefully
B. more carefully
C. most carefully
D. the most careful
按税收与价格的关系分类，税收可分为( )。
A．价内税
B．价外税
C．从价税
D．配赋税
E．从量税
