单项选择题
2.I can’t stand him. He always talks as though he___________ everything.
A、 knew
B、knows
C、has known
D、had known
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单项选择题
McCall质量模型把软件特性分成3组,错误的是
A.产品运行
B.产品生产
C.产品转移
D.产品修正
