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【单选题】
下列离子方程式正确的是( )。A.
等物质的量浓度的Ba(0H)，溶液与明矾溶液以体积比3: 2混合
B.
Fe(OH)2溶于稀硝酸中
C.
H2O 中投入Na2O2固体
D.
CuCl2溶液中加入Na2S 溶液
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【简答题】下列属于尾突出体作用的是( )1增强船尾的结构强度2保护车叶和舵3扩大甲板面积4改善航行性能
【单选题】听力原文：M: Tell me about your trip to Philadelphia. W: Well, we went to a lot of places, visited some interesting monuments and finished up at a famous restaurant. M: So you have had a wonderful holiday....
A.
A wonderful trip.
B.
Some interesting monuments.
C.
A famous restaurant.
D.
A high statue in Philadelphia.
【简答题】A.The reason why few mummies are left today. B.The three most famous Egyptian mummies. C.Mummy and mummification. D.A safe passage to the afterlife AB. The reason why Egyptians made and gave up ...
【单选题】下列属于尾突出体作用的是________。1保护螺旋桨和舵;2扩大甲板面积;3改善航行性能;4减少伴流影响;5增强船尾结构强度。
A.
①②③④⑤
B.
①②③④
C.
①③④⑤
D.
①②④⑤
【单选题】What is the substantial difference between Newman's summer and that of other students?
A.
He focuses on Internet while others go to big famous places of finance and politics.
B.
He plays a lot while others take various jobs.
C.
His summer work is more practical and independent than others'.
D.
He works hard while others play a lot.
【单选题】More and more people love traveling because they’d like to go to some other places and experience something _____ from what they see every day.
A.
beautiful
B.
different
C.
famous
D.
wild
【简答题】尾突出体的作用是( )1扩大甲板面积2保护螺旋桨和舵3改善航行性能
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