家政服务员在带领客人会见主人时，要配合对方的步调，在客人（）做引导。A、左前侧 B、

考考你的阅读能力。正确的写“T”，错误的写“F”。

      Linda is a nice girl. Her hobby is telling riddles (谜语). She often reads riddles to her classmates. She took

a holiday last week. This is the dialogue between Linda and Mike.

Linda: Hi!

Mike: Hi! Where did you go on your holiday?

Linda: I went to a country. It has the word " pain " in it.

Mike: Let me think. Oh, I know! Did you go to Spain?

Linda: Yes, that's right. I went to Spain.

Mike: How did you go there?

Linda: I went there by... OK. It has the word " rain " in it.

Mike: I know. Did you go by train?

Linda: Yes. I went to Spain by train in the rain.

( ) 1. Linda went to Japan on her holiday.

( ) 2. Mike went to Spain last week.

( ) 3. Linda went by plane.

( ) 4. Linda likes telling riddles.

在感染早期，渗出以中性粒细胞为主的原因是

A．中性粒细胞数量增多

B．中性粒细胞体积小

C．中性粒细胞移动迅速

D．中性粒细胞可塑性大

E．中性粒细胞只需低浓度超化因子刺激

社会文化历史学说的代表人物（）。

A．弗洛伊德

B．皮亚杰

C．维果斯基

D．伊扎德

攀登支柱时要手把牢靠，脚踏稳准，尽量避开设备并与带电设备保持规定的（）。

A.规定距离

B.可靠距离

C.安全距离

D.一般距离

已知α=(1，k，-2)T是二次型

矩阵A的特征向量，试用正交变换化二次型为标准形，并写出所用坐标变换．