单项选择题

A．Check the figures later today.
B．Do the calculations again tomorrow.
C．Bring a calculator tomorrow.
D．Calculate the number fight now.
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单项选择题
A．His great happy smile.B．His sad and slow songs.C．His wonderful jazz music.D．His handsome appearance.
A．His great happy smile.
B．His sad and slow songs.
C．His wonderful jazz music.
D．His handsome appearance.
单项选择题
It can be inferred from the passage that the author assesses the truth about opaque-2-maize in that ______.
A．it is a more recent innovation that the use of fish-protein concentrates
B．it can be stored as easily as other varieties of maize
C．it is more popular than the fish-protein concentrates
D．it may be more susceptible to insects than other varieties of maize
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