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【单选题】
$\lim_{n\to \infty } \, e^{-n}$
A.
0
B.
1
C.
-1
D.
$\infty$
参考答案：
参考解析：
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【单选题】If it would take us a second for a single memory access, how long would it cost for a single access to the external storage?如果说访问一次内存需要1秒，则一次外存访问大概需要：
A.
a hour 1小时
B.
a day 1天
C.
a month 1月
D.
a year 1年
【单选题】$\lim_{x\to \infty } \, \left(\sqrt{x+\sqrt{x+\sqrt{x}}}-\sqrt{x}\right)$
A.
$0$
B.
$1$
C.
$\frac{1}{2}$
D.
$2$
【单选题】$\lim_{n\to \infty } \, \frac{\ln (n)}{\ln (3 n)}$
A.
$\frac{1}{3}$
B.
$3$
C.
$1$
D.
不存在
【单选题】Through the group discussion between ______ , we figured out the differences between adolescence and adulthood.
A.
Abbas, Zuowan and Jialin
B.
Billy, Xuanhui and Jialin
C.
Abbas, Xuanhui and Jialin
D.
Billy, Xuanhui and Zixiao
【单选题】In the main part of Text A, ______ showed us some opinions on the relationship between musical experiences and intelligence.
A.
Kamlesh
B.
Jason
C.
John
D.
Abbas
【单选题】What's the time complexity for searching in a B-tree of order 4 and size n?在存储了n个元素的4阶B树中查找，单个节点进行一次查找的时间复杂度为：
A.
O(1)
B.
O(lgn)
C.
O(n)
D.
O(nlgn)
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