John is such a(n) ________ boy that he doesn't want to do any work.
A:careless
B:lazy
C:ashamed
D:fashionable
—I like art , .
元素或基团
C
H
O
N
氨基
羧基
多肽E
201
348
62
53
3
2
多肽F
182
294
55
54
6
1
已知反比例函数y=-2x,下列结论不正确的是 ( )