函数f(x)=x5+x-3的零点落在的区间是[ ]
A．[0，1]
B．[1，2]
C．[2，3]
D．[3，4]
答案：B
种一批树苗，这种树苗的成活率一般为80%～90%，如果要确保3000棵树苗成活，那么至少应栽______棵树苗．
Whenever a big company ______ a small one, the product almost always gets worse.
A．gets on with.
B．cuts down
C．takes over
D．puts up with
