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【判断题】
单链表取值查找算法之平均时间复杂度为O(n)。A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】The boy stood his head down, listening to his mother scolding him for breaking the windows.
A.
for
B.
of
C.
with
D.
around
【简答题】航空货物运输的特点有哪些?
【简答题】The boy pressed his nose a______ the window, looking outwards at the children playing in the street.
【单选题】Only when his mother arrived ___________.
A.
the boy stopped crying
B.
stopped the boy crying
C.
the boy did stop crying
D.
did the boy stop crying
【单选题】The boy did his homework with the help of his father in the past. But now he can do it alone .
A.
for himself
B.
on himself
C.
by himself
D.
with himself
【单选题】How did the President treat the boy who had lost his father?
A.
He asked the boy to leave immediately.
B.
He accepted a typewriter as a gift from the boy' s mother.
C.
He would rather stay alone with the boy.
D.
He would help the boy and the poor family.
【单选题】VPN实现网络安全的主要措施是 (48) ，L2TP与PPTP是VPN的两种代表性协议，其区别之一是 (49) 。 （48）
A.
对发送的全部内容加密
B.
对发送的载荷部分加密
C.
使用专用的加密算法加密
D.
使用专用的通信线路传送
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