A:that, that
B:as, a
C:as, that
D:that, a
下列函数中是二次函数的有( )
①y=x+1x;②y=3(x﹣1)2+2;③y=(x+3)2﹣2x2;④y= 1x2+x.
我国内流河和外流河的丰水期都在夏季,其主要原因是( )
选出相对应的答句。
①What size do you want? ____ A. Yes, she does.
②Does Lulu like rabbits? ____ B. He's a farmer.
③What's your father do? ____ C. Size 25, please.
④Do you have any shoes? ____ D. Yes, I am.
⑤Are you a teacher? ____ E. Yes, we do.