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【多选题】
从结构上可以将城域网分为：A.
骨干层
B.
汇聚层
C.
接入网
D.
物理层
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】Romantic novels, as opposed to realistic ones, tend to present idealized versions of life,often with a happy ending.
A.
in contrast to
B.
in regard to
C.
in terms of
D.
in light of
【单选题】We will go climbing _______ it ________ tomorrow.
A.
if, rains
B.
if, will rain
C.
unless, rains
D.
unless, will rain
【单选题】Unless all the members agree to ____to the plan there may be further development in the course of action.
A.
tumble
B.
stick
C.
come
D.
adjust
【简答题】随机对照试验的优、缺点有哪些?
【单选题】_____ you eat less sugar, you will lose _____. [ ]
A.
If; heavy
B.
Unless; weigh
C.
If; weight
D.
unless; weight
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