问题
单项选择题
成品烟片钾(K)的检验用()进行检验
A.光电比色法
B.滴定法
C.色谱法
D.火焰光度法
答案
参考答案:A
成品烟片钾(K)的检验用()进行检验
A.光电比色法
B.滴定法
C.色谱法
D.火焰光度法
参考答案:A
完形填空。 | |||
Kate's father and mother 1 teachers. They teach 2 the same school. They go to school 3 their bikes at seven in the 4 , and they go 5 at five in the afternoon.Kate and 6 brother, Jack are 7 students. They are in the same 8 , but they are in 9 grades. Kate is in Grade One. Jack is in Grade Three. Now it’s four o'clock in the afternoon. It's 10 to play games. | |||
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