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【简答题】
根据病毒感染机体所引起症状的明显程度，可分为______和______。
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【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】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】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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