绵马贯众叶柄横切面( )
A.分体中柱呈“U”形B.分体中柱5~13个C.分体中柱2个D.分体中柱2~4个E.分体中柱5~8个
参考答案:B
请根据对话内容,从下面方框中选出五个适当的句子补全对话,并在答题卡上按要求作答。其中有两项是多余的。
A: Welcome to I COOL, YOU COOL, madam. How can I help you?
B: __小题1:____
A: This way, please. These are the latest fashion.__小题2:___
B: It looks cool. But I don’t like bright green.
A: We’ve got other colors: pink, grey ,dark red and yellow.___小题3:____
B: Pink. Could you show me that light pink one?
A: ___小题4:____ And it’s very thick.
B: I like it.___小题5:____
A: It was 100 dollars and now it’s only 80 dollars.
B: That’s a great price. I’ll take it.
设矩阵A=(aij)3×3满足A*=AT,其中A*为AT的伴随矩阵,A*为A的转置矩阵.若a11,a12,a13为三个相等的正数,则a11为______.