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【单选题】
关于 VPN 的概念,下面哪种说法是正确的 ( )A.
VPN 是局域网之内的安全通道
B.
VPN 是在互联网内建立的一条真实的点 - 点的线路
C.
VPN 是在互联网内建立的虚拟的安全隧道
D.
VPN 与防火墙的作用相同
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【简答题】切击式水轮机主要组成有哪些？简要说明各组成部分的作用？ 2、简要陈述中国水资源的特点。
【单选题】Talks between the two countries______ when the two sides failed to reach an agreement.
A.
made a living by
B.
searched for
C.
broke down
D.
were better off
【简答题】accommodation compelled pillars flourish vivid tolerance applied precede persist hierarchical segment calculate bound philosopher flo...
【简答题】根据句意及首字母提示补全单词。 1. With the d_____ of China, all the children can go to school. 2. The two sides failed to reach a_____. 3. Some spaceships have gone b_____ the solar system. 4. We are here to p_____ ...
【简答题】Fill in the blank with a proper word. Change the form where necessary. erect segment accommodation bound philosopher compelled dominant barriers sector disc...
【单选题】The two sides failed to agree _________ every point but came to an accommodation.
A.
with
B.
on
C.
to
D.
that
【单选题】The two sides failed to agree on every point, but they settled on a(n) ________for their differences.
A.
weapon
B.
auction
C.
accommodation
D.
segment
【单选题】在 [Cu(en)2]2+离子中，铜离子的价态和配位数分别是（其中 en 代表乙二胺 H2N-CH2-CH2-NH2） (1) 0 和 4 (2) +2 和 2(3) +2 和 8 (4) +2 和 4
A.
(1)
B.
(2)
C.
(3)
D.
(4)
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