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【单选题】
Wittig 反应是 Wittig 试剂与醛、酮的羰基发生亲核加成反应,形成( )。A.
炔烃
B.
烯烃
C.
烷烃
D.
以上都不对
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【简答题】These are different types of buses (range) ______ from 11 seats to 44 seats.
【单选题】Passengers sitting ____________ are required to be over 18 years old and read the safety instruction card very carefully.A. in the window seats B. in the aisle seats C. next to the emer...
A.
in the window seats
B.
in the aisle seats
C.
next to the emergency exits
D.
in the middle seats
【单选题】The cabin seats include the following seats EXCEPT ____________.
A.
seat pockets
B.
aisle seats
C.
window seats
D.
emergency exit seats
【单选题】听力原文：M: Amanda, did you check the website to see if there are still some seats left for the movie this afternoon? W: Yes, I already checked a few minutes ago and booked tickets online for the two o'cl...
A.
She ordered them from the bookstore.
B.
She went to the theater and bought them.
C.
The Bovarys sent the tickets to them.
D.
She bought them on the Internet.
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