Miss. White: What's your name?
John: ____________
A:Nice to meet you.
B:Good morning, Miss. White
C:How are you?
D:My name is John.
在探究“绿叶在光下制造有机物(淀粉)”的实验中,对实验过程和结果的解释不正确的是( )
请你根据你所学的化学知识,谈谈硬水对人类生产或生活可能产生的不良影响的例子.