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【简答题】
某化合物 A ( C 5 H 6 ),能使溴的四氯化碳溶液褪色,该化合物与 1mol 溴化氢加成 B ( C5H7Br ), B 经臭氧化 - 还原水解生成 2- 溴戊二醛( OHCCH2CH2CHBrCHO ,试写出 A 、 B 的名称。 A ; B 。
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【简答题】The boat sails _____________________(河上).
【简答题】The boat sails _______________________ (河上).
【简答题】Fill in each blank according to the Chinese given in brackets. 1. She left the manager’s office ____________ ( 哭着 ). 2. The boat sails _________________ ( 河上 ). 3. The manger will come back __________...
【单选题】Sailcloth & More currently produces boat sails and is considering expanding its operations to include awnings for homes and travel trailers. The company owns land beside its current manufacturing faci...
A.
-$785,000
B.
-$823,000
C.
-$835,000
D.
-$859,000
【单选题】What invention allowed the Ancient Chinese to build huge ships well before the rest of the world?
A.
Silk Sails
B.
Boat rudder
C.
Waterproof Lacquer
D.
Compass
E.
Iron casting
【单选题】Sailcloth & More currently produces boat sails and is considering expanding its operations to include awnings for homes and travel trailers. The company owns land beside its current manufacturing faci...
A.
-785000
B.
-823000
C.
-835000
D.
-859000
E.
-883000
【简答题】The boat sails ____. (河上). ___________
【单选题】On the Indian Ocean Zac struggled two days and nights because ________.
A.
heavy wire was hurting the mast
B.
the mast was in danger of breaking
C.
wild waves tossed the boat
D.
the wind whipped at the sails
【单选题】听力原文： About a hundred years ago, the people of London were amazed to see an extraordinary boat come sailing up the Thames River The boat had four-cornered sails made of mats, big wooden eyes on the bo...
A.
By sailing round Europe.
B.
By sailing completely round the world.
C.
By sailing through the Arctic Ocean.
D.
By sailing round the tip of Africa.
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