【单选题】We have time and again _____ that we will never be the first to use nuclear weapons.
【简答题】请根据所看视频填空,注意时态或单复数。 1. We are _____ a _____ time right now. 2. Some of us are cutting down their ____. 3. It is a _____ without guns, bombs or smoke. 4. We shall _____ against _____. 5. We have the __...
【单选题】在下列各组物质中,两种物质均有剧毒的是( )
【简答题】常温下氯气是一种黄绿色气体,密度比空气大,有剧毒,能溶于水,且能与水、碱等物质反应.请回答下列问题: (1)液氯属于______. A.化合物 B.混合物 C.单质 D.氧化物 (2)救援人员为消除危险源,将载氯槽罐车吊移至水池,并用氢氧化钠进行处理.氯气与氢氧化钠发生的反应是:Cl 2 +2NaOH═X+NaClO+H 2 O 请推断X的化学式______.Na...
【单选题】在下列各项中,能够引起企业自有资金增加的筹资方式是 ( )
【简答题】We have time and again _____ that we will never be the first to use nuclear weapons.A. declared B. accused C. announced D. blamed