A:K+、Na+、Cl﹣、NO3﹣
B:K+、H+、SO42﹣、Cl﹣
C:Na+、NH4+、NO3﹣、SO42﹣
D:Ca2+、Cu2+、Cl﹣、NO3﹣
看图读一读。填空。
super long toy bears robot don't
A: Good morning. Can I help you?
B: Yes.
A: Do you like ____?
B: No, I ____. I like robots. They're ____.
A: Look at this ____. Its legs are ____. It can run. It's cool. Do you like it?
填入合适的词语。
跳入____ 拔出____
冒出____ 钻进____