下列与材料的孔隙率没有关系的是( )。
A.强度
B.绝热性
C.密度
D.耐久性
参考答案:C
解析:密度是指材料在绝对密实状态下,单位体积的质量
口语应用(补全对话)(10分)
Wang Fang: Hello, Li Ming, I phoned you yesterday afternoon, but nobody answered the phone . 小题1:_ __?
Li Ming: I have been to the zoo with my friends.
Wang Fang: 小题2:_____ _____
Li Ming: We went there by bus.
Wang Fang: How was it?
Li Ming: Oh, great! But I never want to go there again.
Wang Fang: 小题3:_ ___?
Li Ming: Because there were too many children there. We got lost and couldn’t find each other..
Wang Fang: 小题4:___ __! Have you found them yet?
Li Ming: Yes, they have already gone home .I really hate to go to such a place
Wang Fang: 小题5:_ . And there are even more children for the holidays.
Li Ming: That’s true .
假设某程序语言的文法如下:
S→a|b|(T)
T→TdS|S
其中:Vt=(a,b,d,(,),Vn=S,T,S是开始符号。
考察该文法,称句型(Sd(T)db)是S的一个 (1) 。其中 (2) 是句柄: (3) 是素短语; (4) 是该句型的直接短语; (5) 是短语。
2()
A.S
B.b
C.(T)
D.Sd(T)