小槐同学用托盘天平称量7.5g(1g以下用游码)食盐时,错误地将食盐放在右盘里,砝码放在左盘里,发现指针向左偏。则他最好( )
A:向右盘加食盐至天平平衡
B:向左盘减砝码至天平平衡
C:先在左盘加1g砝码,再向右盘加食盐至天平平衡
D:将砝码和食盐取回重新称量
⑴____What are these?
⑵____Is there an apple on the table?
⑶____How many bikes are there ?
⑷____Can you drive a car?
⑸____What's the weather like in spring?
A: There're five.
B: It's warm.
C: They're pears.
D: Yes, there is.
E: No, I can't.
长江被称为“水能宝库”,其水能资源主要集中在( )
下列城市中自转线速度最大的是( )