A.進(jìn)行對照試驗 B.進(jìn)行空白試驗 C.增加平行試驗的次數(shù) D.進(jìn)行儀器的校準(zhǔn)
A.酸式滴定管 B.容量瓶 C.刻度燒杯 D.量筒
A.0.496% B.0.5% C.0.5021% D.0.50%