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【单选题】
下列仪器:1烧杯;2坩埚;3量筒;4表面皿;5蒸发皿;6容量瓶;7烧瓶。能用酒精灯加热的是:( )A.
①②④⑤
B.
①②④⑦
C.
②③⑤⑥
D.
①②⑤⑦
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举一反三
【判断题】The early American romanticists gave emphasis to emotion and nature; some of them sang of liberty and national independence and wrote in defence of Negro slaves and Indians. ( )
A.
正确
B.
错误
【判断题】The early American romanticists gave emphasis to emotion and nature; some of them sang of liberty and national independence and wrote in defense of Negro slaves and Indians.
A.
正确
B.
错误
【简答题】以太网采用的协议是( )方法，即带有()的载波侦听多路访问方法。
【判断题】The early American romanticists gave emphasis to emotion and nature; some of them sang of liberty and national independence and wrote in defense of Negro slaves and Indians.
A.
正确
B.
错误
【简答题】以太网采用的协议是 协议。
【简答题】以太网采用的协议是( )。
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