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【单选题】
龋病的临床特征是A.
牙齿硬组织的
B.
牙齿硬组织色泽发生变化
C.
牙齿硬组织的无机质脱矿，有机质分解
D.
牙齿硬组织发生龋洞
E.
牙齿硬组织色、形、质均有变化
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举一反三
【单选题】From the story we know_____
A.
Chopin could be famous because of his own talent and the help from Liszt
B.
Liszt planned to make Chopin famous
C.
Liszt was Chopin's teacher
D.
one could be famous only with the help of a famous pianist
【单选题】By plotting the ysis messages on weather charts, we are able to .
A.
pr any possible accident at sea
B.
prepare a reasonable forecast of the wind and weather
C.
help the mariner to fix an accurate ship’s position
D.
aid the salvage of a ship in peril
【单选题】Yesterday my friend and I went to the supermarket nearby. We found that there were _______ nothi
A.
68. Yesterday my friend and I went to the supermarket nearby. We found that there were _______ nothing worth buying. A．almost
B.
nearly
C.
near
D.
About
【单选题】We offered him our congratulations _____his passing the college entrance exams.
A.
at
B.
on
C.
for
D.
of no
【单选题】They can't answer the question in Japanese; we can't answer it, ___ . A. also
A.
too
B.
either
C.
neither
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