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【单选题】
下列哪一项不是水平面的投影特性A.
H面投影反映
B.
V面投影积聚成线
C.
W面投影积聚成线
D.
V面投影反映
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【简答题】100Base-FX中的100表示___,Base表示___,FX表示___。
【单选题】---It’s a long time _____ I saw you last. ---Yes, and what a pity it is now that it will be a long time _______ we see each other again.
A.
before; since
B.
since; when
C.
since; before
D.
when; before
【单选题】When you are having a old ______.
A.
it is always the same kind of cold that you had last time
B.
it may be the same kind of cold that you had last time
C.
it is certainly not the same kind of cold that you had last time
D.
it is probably not the same kind of cold that you had last time
【简答题】IEEE802.3 的100BASE-FX中的FX表示为 。
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