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【单选题】
当x→2时，下列函数中不是无穷小量的是（ ）．A.
B.
C.
D.
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【简答题】回文数是指从左到右与从右到左读都一样的．如22，，11，3443，94249等．显然2位回文数有9个：11，22，33…，99.3位回文数有90个：101，111，121，…，191，202，…，999．则： （Ⅰ）4位回文数有______个； （Ⅱ）2n+1（n∈N + ）位回文数有______个．
【单选题】From his ______ look, we can see he is ______ in the film very much.
A.
exciting; interesting
B.
excited; interesting
C.
excited; interested
D.
exciting; interested
【单选题】In the film “The Captain”, we can see _________ is the command center of the aircraft.
A.
terminal building
B.
airline operational control center
C.
power system
D.
air freight station
【单选题】In the film, we can see a train is carrying some women to Auschwitz concentration camp. The white-and-black color, plus the flashing and changing of shadow and light can create an atmosphere of all ex...
A.
horror
B.
desperation
C.
uncertainty
D.
distrust
【单选题】In the film "The Captain", we can see _________ is the command center of the aircraft.
A.
airline operational control center
B.
power system
C.
terminal building
D.
air freight station
【简答题】回文数是指从左到右与从右到左读都一样的．如22，，11，3443，94249等．显然2位回文数有9个：11，22，33…，99.3位回文数有90个：101，111，121，…，191，202，…，999．则： （1）4位回文数有（ ）个； （2）2n+1（n∈N+）位回文数有（ ）个。
【单选题】We are studying your offer and hope that it will remain till the end of credit payable by draft at sight.
A.
open
B.
okay
C.
close
D.
order
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