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【单选题】
下列关于基因的叙述,不正确的是 A .能够储存遗传信息 B .是任意的 DNA 片段 C .可以控制生物性状 D .在染色体上呈线性排列A.
1
B.
2
C.
3
D.
4
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举一反三
【简答题】He earns ______ (much)money now, but is ______ (little)respected than he used to be.
【单选题】查询选修C2课程号的学生姓名，下列SQL，语句中错误的是（ ）。
A.
SELECT姓名FROM S WHERE EXISTS (SELECT*FROM SC WHERE学号=S．学号AND 课程号=’C2’)
B.
SELECT姓名 FROM S WHERE学号IN (SELECT学号FROM SC WHERE课程号=’C2 ’)
C.
SELECT姓名FROM S JOIN SC ON S．学号=SC． 学号WHERE课程号=’C2’
D.
SELECT姓名FROM S WHERE学号= (SELECT学号FRM SC WHERE课程号=’C2’)
【单选题】He earns quite a high ______ in his present job.
A.
salary
B.
bill
C.
check
D.
payment
【单选题】______ he earns, the more he spends.
A.
How much
B.
For how much
C.
The more
D.
Whatever
【单选题】查询选修C2课程号的学生姓名，下列SQL语句中错误是
A.
SELECT 姓名 FROM S WHERE EXISTS(SELECT * FROM SC WHERE学号=S.学号 AND 课程号="C2")
B.
SELECT 姓名 FROM S WHERE 学号 IN(SELECT 学号 FROM SC WHERE 课程号="C2")
C.
SELECT 姓名 FROM S JOIN SC ON S.学号=SC.学号 WHERE 课程号="C2"
D.
SELECT 姓名 FROM S WHERE 学号=(SELECT 学号 FROM SC WHERE 课程号="C2")
【单选题】It is clear that ________ little money he earns can hardly support ________family as large as his.
A.
the；a
B.
a；the
C.
/；a
D.
/；the
【单选题】Which of the following sentences is INCORRECT?
A.
He earns twice as much as he used to.
B.
The width of this new road is two times that of the old one.
C.
This book is four times more expensive than that one.
D.
The new square is four times size that of the previous one.
【简答题】A．He works at night. B．He's changing jobs. C．He is a dentist. D．He only earns a little.
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