甲藻是重要的浮游藻类,也是水生动物的主要饵料,但其过量繁殖,常使水变红,形成______,并产生大量有毒物质。因此,对渔业危害很大。
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A. Saying goodbye to her secretary.
Buying a ticket for a concert.
C. Ordering a dinner in a hotel.
D. Booking a flight ticket.
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A. New tasks.
B. Trip expense.
C. Vacation.
D. Trip to Europe.
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A. It is put on the man"s desk.
B. It resembles a deer.
C. It is imported from northern America.
D. It is made of soap stone.