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【单选题】
二进制 0110 1110 转换为十六进制为( )A.
0x23
B.
0x67
C.
0x6e
D.
0x59
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举一反三
【单选题】Despite their good service, most inns are less costly than hotels of _____ standards.
A.
equivalent
B.
uniform
C.
alike
D.
likely
【简答题】已知数列{a n }是首项为1的等差数列，且公差不为零，而等比数列{b n }的前三项分别是a 1 ，a 2 ，a 6 ． （I）求数列{a n }的通项公式a n ； （II）若b 1 +b 2 +…b k =85，求k的值．
【单选题】（文）等差数列{a n }公差不为零，首项a 1 =1，a 1 ，a 2 ，a 5 是等比数列，则数列{a n }的前10项和是（ ）
A.
90
B.
100
C.
145
D.
190
【简答题】第13次作业报价单的制作
【单选题】数列{a n }是公差不为零的等差数列，a 7 ，a 10 ，a 15 是等比数列{b n }中的连续三项，若该等比数列的首项b 1 =3，则b n 等于 [ ]
A.
B.
C.
【单选题】Most of the big hotels in Shanghai were full last week, but finally we _____ find a room in a small one. [ ]
A.
ought to
B.
could
C.
were able to
D.
might
【单选题】Winter is the______season at most hotels in this seaside town, because very few tourists come to stay.
A.
slow
B.
slack
C.
low
D.
quiet
【单选题】数列｛a n ｝是公差不为零的等差数列，且a 7 ， a 10 ， a 15 是等比数列｛b n ｝的连续三项，若该等比数列的首项b 1 =3，则b n 等于（ ）
A.
B.
C.
【单选题】Which of the following types of hotels would likely appeal most to pleasure/leisure travelers?
A.
airport hotels
B.
resort hotels
C.
residential hotels
D.
convention hotels
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