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【单选题】
浓缩精制的方法中不包括A.
生物学方法
B.
化学沉淀法
C.
物理学方法
D.
层析法
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皮皮学刷刷变学霸
举一反三
【单选题】When we evaluate various sources, which one of the following might NOT be reliable?
A.
Sources which are those of experts in the field because those articles are reviewed by other experts before being published
B.
Sources coming from prestige publishers and government which usually have the resources and expertise to provide official information
C.
Sources from well-known and respected organization which have the resources and expertise that allow them to provide reliable information
D.
Web-based sources because there is no way of knowing whether the information is accurate or not if an author or organization is not defined, or if there is no date.
【多选题】Which two of these multicast deployments are most susceptible to attacks from unknown sources？（）
A.
ASM
B.
BiDir PIM
C.
PIM-SM RP
D.
RP-Switchover
E.
Source Specific Multicast
【多选题】From which sources may primary insurer purchase reinsurance?( )
A.
Professional Reinsurer
B.
Direct Writing Company
C.
Reinsurance Pools
D.
Lloyd‘s of London
【单选题】What is the translation of “Nonrenewable energy is obtained from sources at a rate that exceeds the rate at which the sources are replenished.”
A.
非可再生能源获得的速度超过了它的补充率
B.
化石燃料中的石油天然气是当今世界的主要一次性能源
C.
有些能源被称为可再生能源资源。这是因为，与非可再生能源资源不同，他们不会紧缺(即取之不尽，用之不竭)。
D.
涨潮和落潮之间的差异可以有数米，潮汐运动的能量可以用来发电。
【单选题】Which of the following sources may not be considered reliable or trustworthy when a speaker cites statistics from them?
A.
government websites
B.
personal blogs
C.
none of the above
D.
academic institutions
【简答题】定体气体温度计的测温气泡放入水的三相点管的槽内时，气体的压强为6.65×10 3 Pa。
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