Why does the author say that “these species of fungi seem rather strange”?
A、They are larger than typical fungi.
B、Unlike other fungi, they can produce their own food.
C、They exist only as partners of algae.
D、They do not fit into any known class of fungi.
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In the expression “a single bar of it” in the last paragraph, “it” refers to.
A、the tune of the last concerto
B、one of Mozart’s musical works
C、part of the knowledge we have
D、a measurement on the stave
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The passage is primarily concerned with ______.
A、informing readers of different sea creatures
B、describing predatory microscopic organisms
C、solving some long-lasting mysteries about the sea
D、discussing the environment for various fishes
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According to the passage, what was the strategy used to eliminate the spread of smallpox?
A、Vaccinations of entire villages.
B、Treatment of individual victims.
C、Isolation of victims and mass vaccinations.
D、Extensive reporting of outbreaks.
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From the beginning of this passage we know that.
A、most of the American states were prohibited to take a rest
B、the United States of America prohibited others from rest
C、the United States of America prohibited alcohol sales
D、most states in the country began to allow alcohol sales
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How did the narrator and his aunt travel to see his father?
A、By car.
B、By bus.
C、By ship.
D、By train.