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【单选题】
下面属设备的是？A.
继电保护装置
B.
发电机
C.
变压器
D.
高压隔离开关
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皮皮学刷刷变学霸
举一反三
【简答题】We have days and nights because of _____of the earth.
【单选题】We may have dreams because we have needs that are _____ in our daily lives.
A.
unknown
B.
undone
C.
unborn
D.
unmet
【简答题】Because we human beings have sophisticated and personalized brains, we have the notion of self.
【单选题】We have no time to have a rest on Sundays, because ourteachers _______ us do a lot of homework.
A.
． tell
B.
． get
C.
． ask
D.
． have
【单选题】We can't go home _____ the heavy rain and we have to wait _____ it stops. [ ]
A.
because; or
B.
because of; until
C.
because; but
D.
because of; for
【简答题】氯气（Cl 2 ）通常情况下为有强烈刺激性气味的黄绿色的气体，具有强氧化性，一定条件下可与除Pt、Au外大部分金属反应．氢气在氯气中能安静地燃烧，发出苍白色火焰，而红热的铜丝在氯气里剧烈燃烧，冒出大量的棕黄色的烟．请根据资料回答下列问题： （1）根据上述资料提供的信息，你对燃烧有什么新的认识？______． （2）氯气的活动性比氧气的活动性______（填“强”或“弱”）． （3）与金属相似，活泼...
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【简答题】Because we human beings have sophisticated and personalized brains, we have the notion of self.