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【单选题】
当A1si，V2su时，A5i；当A2si，V4su时，V24u 求：当A2si，V6su时，u？A.
-31.5V
B.
31.5V
C.
-45V
D.
45V
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Paragraph 4 ____________
A.
Ounces of water needed per day
B.
Importance of water
C.
Composition of water
D.
Signs of dehydration
E.
Supply of water
F.
Necessity for bringing a bottle for water with you
【简答题】听录音，选出你听到的单词。 ( ) 1. A. cake ( ) 2. A. elephant ( ) 3. A. Coke ( ) 4. A. water ( ) 5. A. coffee B. bread B. hot dog B. dog B. bird B. tea C. mouse C. hamburger C. juice C. milk C. ...
【判断题】关于及时总结和建立关联,表述正确的有 Review:() Think back over main points the speaker has already presented and see if you can follow the connections from what they said then to what they are saying now.
A.
正确
B.
错误
【简答题】是指具备兽医相关技能，依照国家相关规定取得兽医执业资格，依法从事动物诊疗和动物保健等经营活动的兽医。
【单选题】What does 'it' of 'since water-vapor becomes water when it cools' in Para. 3. refer to?
A.
Water-vapor.
B.
Cloud.
C.
Water.
D.
Air.
【单选题】Which of the following is a behavior of wasting water in the video?
A.
Water yards and golf courses too much.
B.
Water at the wrong time in hot weather.
C.
Take water as we need
D.
A and B
【单选题】All classes of fires can be safely combated using .
A.
foam
B.
CO2
C.
low velocity water fog
D.
high velocity water fog
【单选题】The water in an operating auxiliary boiler should be tested for alkalinity and chloride content each_____.
A.
hour
B.
day
C.
week
D.
month
【简答题】是指国家对从事动物诊疗和动物保健等经营活动的兽医人员进行执业资格认可的制度。
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