判断题

间接碘量法在滴定前加入淀粉指示剂

答案：错误

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单项选择题

...book is it? A horror story?
A、book is it
B、A horror
C、horror story

多项选择题

Commendatory
Neutral
Derogatory [填空1][填空2][填空3][填空4][填空5][填空6][填空7][填空8][填空9][填空10][填空11][填空12]
Can you categorize the words or sentences into different columns

A．A
B．B
C．C
D．D