皮皮学，免费搜题
登录
搜题
【简答题】
设1×n矩阵α=( 0…0 )，矩阵A=E-α T α，B=E+2α T α，其中E为n阶单位矩阵，则A=______． (A)0 (B)-E (C)E (D)E+α T α
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】We don't believe that those special kinds of leaves are______.
A.
compulsive
B.
edible
C.
ridiculous
D.
actual
【单选题】The passage is most likely a part of ______.
A.
a news article
B.
a preface
C.
a research report
D.
a journalistic interview
【单选题】听力原文：W: Can you believe we got a seat so quickly? M: It's usually crowded here at lunch time. W: I know. I wonder why it's not today. Q: What does the woman imply about the restaurant? (15)
A.
There will be more people in the restaurant at dinner time.
B.
There are fewer people than usual.
C.
They don't have any lunch special today.
D.
It's very busy.
【单选题】Where will customer opinions be posted?
A.
On a Web site
B.
In a newsletter
C.
In a news article
D.
On a bulletin board
【单选题】Part A Directions: You will hear 10 short dialogues. For each dialogue, there is one question and four possible answers. Choose the correct answer ― A, B, C or D, and mark it in your test booklet. You...
A.
Spring.
B.
Summer.
C.
Early autumn.
D.
Early winter.
相关题目：