题目内容

标定EDTA实验中,计算后的平均偏差可保留1或2位有效数字。

A. 对
B. 错

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标定EDTA实验中,用EDTA标准溶液滴定至溶液由红色变为紫蓝色即为终点,使计算的EDTA浓度偏大。

A. 对
B. 错

1. ____________ is the most common cause of secondary intracerebral hemorrhage.

2. Secondhand smoke also damages blood vessels, interferes with circulation and increases the risk of _____________.

3. She is deaf, but refuses to let her __________ prevent her from doing what she wants to do.