根据下列实验目的,所选试剂及操作方法都正确的是( )
选项
实验目的
所选试剂及操作方法
A
除去二氧化碳中的少量一氧化碳气体
通入氧气、点燃
B
除去氯化钾中的二氧化锰
加水溶解、过滤、蒸发
C
除去氧化钙中的碳酸钙
加水溶解、过滤
D
除去稀盐酸中的稀硫酸
加入足量的氢氧化钡溶液、过滤
A:A
B:B
C:C
D:D
Su Bingtian broke the record. He runs ______ than anyone else in Asia.
米勒的实验证明了( )
W:How are you?
M1:I'm ____. What's wrong with you?
W:I want to send an ____. But I don't have a computer.
M1:You can ask your teacher to help you.
W:Good ____!
W:Hello,Mr. Li. Could I use your computer?
M2:Sure. It's there on your ____.
W:Thanks,Mr. Li. It's very ____ of you.
M2:You're welcome.