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【单选题】
旋杯式燃烧器由点火系统和正常燃烧点火系统,下列_____不属于点火系统?A.
点火油泵
B.
点火供油电磁阀
C.
主燃烧器
D.
点火燃烧器
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【简答题】She spoke so_________ (声音小)that I could hardly hear her at first．
【判断题】高密度脂蛋白(HDL)能从周围组织转运胆固醇到肝脏进行降解排泄。这样,能防止胆固醇沉积在血管壁上,甚至已经沉积的胆固醇,亦能由HDL予以转移,可以防止并有可能消除动脉粥样硬化的形成。
A.
正确
B.
错误
【简答题】Reading 13 The Web Way to Learn a Language The young woman seated next to us at the restaurant had an exotic air; her looks and style, we thought, made it likely that she was not American born. But th...
【简答题】句型转换 She spoke louder so that she could be heard by people at the back of the big hall. She spoke louder by people at the back of the big hall
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