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【单选题】
玉米和高粱制种区的播种期和周围其他品种的播种期错开 ____ 天左右,便能防治外来花粉吹人制种区。A.
10
B.
20
C.
30
D.
40
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【单选题】Show Boat Dinner Theatres has paid annual dividends of $0.32, $0.52, and $0.60 a share over the past three years, respectively. The company now predicts that it will maintain a constant dividend since...
A.
$ 4 . 32
B.
$3.1 2
C.
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D.
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