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以下程序段的输出结果是______。 int i=9; printf("%0\n", i);

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福尔哈德法既可采用直接滴定,也可采用返滴定。( )

A. 对
B. 错

莫尔法测定氯离子含量时,溶液的pH<5,则会造成正误差。( )

A. 对
B. 错

Questions 11 to 18 are based on the conversation you have just heard.

A. She works at the market.
B. She drives out everyday.
C. She doesn’t go to school every day.
D. She is one of the man’s classmates.

标定AgNO3标准溶液可以使用氯化钠基准物。( )

A. 对
B. 错

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