一个直角三角形的三边为三个连续整数，则它的三边长分别为（ ）。
3，4，5
The wine industry in the area has developed in a special way, _____ little foreign ownership.[ ]
A. by
B. of
C. with
D. from
一般来说，普通火花塞中心电极与侧电极之间的间隙为（）。
A.0.35～0.45
B.0.45～0.55
C.0.5～0.6
D.0.7～0.9
