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【单选题】
设无 G= 是连通的且 |V|=n,|E|=m 若( )则 G是树.A.
m=n+1
B.
n=m+1
C.
m 3n-6
D.
n 3m-6
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举一反三
【单选题】---Jim, ________ read books while you are walking in the street. It’s very dangerous. ---OK, thank you.
A.
don’t
B.
doesn’t
C.
won’t
D.
can’t
【单选题】—When can we make an appointment with you , sir ? —What about Wednesday afternoon ? —OK．_______
A.
Do you have time then ?
B.
It doesn’t suit me．
C.
That’s settled．
D.
It’s so nice to meet you．
【简答题】简述遥感的概念、特点与主要应用。
【单选题】—Please spend much time ____ your school work, ___ your parents will be annoyed. —OK. I’ll do it as you say!
A.
on, or
B.
with, and
C.
in, but
D.
at, then
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