皮皮学，免费搜题
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【多选题】
骨干网结构大体上可以分成A.
网状全连接结构
B.
平面分层结构
C.
平面+空间分层结构
D.
双归属结构
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】When I am free on Sunday, I often drop in my grandparents.
A.
give a ride to
B.
give up visiting
C.
forget to visit
D.
come over to
【单选题】I have to give up my job in advertising because I can't keep up with the rapid _________ of work.
A.
rate
B.
pace
C.
speed
D.
velocity
【简答题】I made up my mind that under no circumstance______(我会同意) to give up my company.
【单选题】------I will hold on to my dream _________ there are so many difficulties. ------Never give up, and you will be successful.
A.
because
B.
until
C.
although
D.
unless
【简答题】张衡所著《二京赋》中，“西京”指的是长安，那“东京”指的是哪个城市?
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