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.
清政府发起洋务运动的根本目的是( )
要想使一台直流电动机的转速增大,下列方法中不可行的是( )
一个加数是470,另一个加数280,和是____ 。被减数是620,减数是350,差是____ 。