预后最差的支气管癌是（）
A.腺癌
B.小细胞支气管癌
C.肺泡细胞癌
D.鳞癌
E.以上所列举的支气管癌的预后相对都是好的
参考答案：B
—What _________ Nancy _________?
—She is friendly, she always helps others. [ ]
A. is; like
B. does; look like
C. looks; like
D. does; like
PC中，设(SP)＝0202H，(SS)＝2000H，执行PUSHSP指令后栈顶的物理地址为( )。
A．0200H
B．20102H
C．20200H
D．0102H
