天疱疮中预后较好的是()
A．寻常型天疱疮
B．增殖型天疱疮
C．红斑型天疱疮
D．落叶型天疱疮
参考答案：B
The picture in an ad looks __ better than the real thing. [ ]
A. very
B.little
C.lots of
D.much
园艺师能将一株仙人掌培育成开多种形态、颜色花朵的仙人掌类植物．下列何种操作能达到上述目的？（ ）
A．组织培养
B．嫁接
C．种子繁殖
D．扦插
