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【简答题】
已知三阶方阵A的特征值为1,2,-1,且 ,则B的特征值为 .
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举一反三
【简答题】Looking up, I saw her eyes fixed on me in______(curiously).
【单选题】The boy opened his eyes for a moment, looking at the captain and then died.
A.
opened his eyes
B.
for a moment
C.
looking at the captain
D.
then died.
【简答题】PROTECTING EYES FROM COMPUTER SCREENS Many of us spend the bulk of the day looking at computer screens. Reading this article means there’s a good chance you’re looking at one right now. But does looki...
【单选题】The top view of an object should typically be drawn:
A.
to the right of the front view.
B.
anywhere on the same page.
C.
directly above the front view.
D.
on a separate piece of paper.
【单选题】The front and top view have ( ), top and left view have ( ), front and left view have ( )
A.
same length, same width ,same height
B.
same width, same length ,same height,
C.
same height, same width ,same length
D.
same width, same length ,same height
【单选题】It is possible to tell the time in day light _______ looking into a cat's eyes.
A.
with
B.
for
C.
by
D.
from
【简答题】Looking up, I saw his eyes fixed on me in (curious) ______.
【单选题】What are the regulations of three views? main view and left view : ; main view and top view: ; top and left view: .
A.
same height; same length; same width
B.
same length; same height; same width
C.
same width; same length; same height
D.
same height; same witdh; same length
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