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【单选题】
下列叙述中正确的是______。A.
每一个结点有两个指针域的一定是非线性结构
B.
所有结点的指针域都为非空的一定是非线性结构
C.
循环是循环队列的链式存储结构
D.
线性结构的存储结点也可以有多个指针
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反馈参考答案：
举一反三
【单选题】What does paragraph 3 mainly discuss?
A.
Different effects of caffeinated coffee and decaf on sleep.
B.
Different findings of Lotan Shilo and a team about caffeine.
C.
The fact that the subjects slept 415 minutes per night after drinking decaf.
D.
The evidence that the subjects took half an hour to fall asleep.
【单选题】What does paragraph 3 mainly discuss?
A.
Different effects of caffeinated coffee and decaf on sleep,
B.
Different findings of Lotan Shilo and a team about caffeine.
C.
The fact that the subjects slept 415 minutes per night after drinking decal.
D.
The proof that the subjects took half an hour to fall asleep.
【单选题】What does paragraph 3 mainly discuss?
A.
Different effects of caffeinated coffee and decal on sleep.
B.
Different findings of Lotan Shilo and a team about caffeine.
C.
The fact that the subjects slept 415 minutes per night after drinking decaf.
D.
The evidence that the subjects took half an hour to fall asleep.
【简答题】What does Paragraph 1 tell us?
【单选题】What does paragraph 3mainly discuss?
A.
Different effects of caffeinated coffeeand decaf on sleep.
B.
Lotan Shilo's research design on sleep.
C.
What the subjects did after drinking decafat night.
D.
Why some subjects took half an hour toall asleep.
【单选题】分离数据库就是将数据库从( )中删除，但是保持组成该数据的数据文件和事务日志文件中的数据完好无损。
A.
Windows
B.
SQL Server
C.
U盘
D.
企业管理器
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