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【简答题】
开放式基金与封闭式基金有哪些区别？
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举一反三
【单选题】下列关于氟利昂说法错误的是()。
A.
氟利昂在对流程中非常稳定
B.
氟利昂在平流层中非常稳定
C.
氯离子自由基参与对臭氧的消耗
D.
氯离子自由基与臭氧发生连锁循环反应,破坏臭氧,但在反应过程中氯离子基本不消耗
【简答题】When you enter the plane, you put your luggage in the (overhead compartment) . You may need to ask a ______________ for help.
【单选题】I’ve already ___ at the hotel.Can I put my luggage in your room for a while?
A.
checked out
B.
checked off
C.
paid off
D.
paid off
【简答题】You could put your big luggage in the Left Luggage.
【多选题】关于氟利昂，下列说法正确的是_______。
A.
氟利昂是一类透明、无味、基本无毒又不易燃烧、爆炸、化学性能稳定的制冷剂
B.
氟利昂能不同程度地溶解润滑油，不易在系统中形成油膜
C.
氟利昂不易腐蚀铜管
D.
氟利昂制冷系统在压缩机排出端应设分油器，以减少润滑油进入系统，安装系统时应考虑能顺利回油
【简答题】When you arrive at the airport for your flight, you go to the ______ ______ first. 2. When your departing flight is announced, pick up your ________ ______ and go to the gate. 3. Before you get on the...
【单选题】Put your luggage in the van quickly () the train will be off in a minute.
A.
before
B.
so that
C.
unless
D.
now that
【单选题】I’ve already ___ at the hotel.Can I put my luggage in your room for a while?
A.
checked out
B.
checked off .
C.
paid for
D.
paid off
【单选题】手部自然修甲正确步骤是( )
A.
去除甲油－修形－消毒－清洁前缘
B.
修形－去除指甲油－消毒－清洁前缘
C.
消毒－去除指甲油－修形－清洁前缘
D.
修形－清洁前缘－消毒－去除指甲油
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