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【单选题】第二篇 Where Have All the Bees Gone Scientists who study insects have a real mystery on their hands. All across the country, honey bees are leaving their hives(蜂巢) and never returning. Rese...
A.
honeybees help produce one-third of the foods we eat.
B.
parasites on bees may spread everywhere.
C.
honeybees cannot find enough food elsewhere.
D.
honeybees feed on flowers.
【单选题】方太极火直喷灶具的蜂巢密簇直喷技术，对这项技术的描述错误的是（）
A.
采用镍铬合金材料，强韧纤薄；
B.
火焰温度可超过500度，猛火快烹；
C.
网片设计可以减少空气引射阻力，燃烧效率高，火力更旺；
D.
网片结构可以使燃气与空气接触面更大，混合充分，燃烧效率高。
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【单选题】第二篇 Where Have All the Bees Gone Scientists who study insects have a real mystery on their hands. All across the country, honey bees are leaving their hives(蜂巢) and never returning. Rese...
A.
honeybees help produce one-third of the foods we eat.
B.
parasites on bees may spread everywhere.
C.
honeybees cannot find enough food elsewhere.
D.
honeybees feed on flowers.
【单选题】方太极火直喷灶具的蜂巢密簇直喷技术，对这项技术的描述错误的是（）
A.
采用镍铬合金材料，强韧纤薄；
B.
火焰温度可超过500度，猛火快烹；
C.
网片设计可以减少空气引射阻力，燃烧效率高，火力更旺；
D.
网片结构可以使燃气与空气接触面更大，混合充分，燃烧效率高。
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