题目内容
The word "unprecedented" in line 25 is closest in meaning to（）
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Basalt, (which )composes (most) of the ocean (floor), is a dark-grey rock (rich )in iron and magnesium than most surface rocks.（）
Candies may be made by (repeatedly dipping) wicks in tallow, by molding, (nor) by pouring (melted wax) over the wicks and rolling them (into) shape.（）
心理活动的内在一致性是指( )。
According to the passage, which of the following activities is characteristic of the early part of the reproductive cycle of birds（）
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