把一个体积为36立方分米的圆柱削成一个最大的圆锥，圆锥的体积是_爱下问搜题

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问题填空题

把一个体积为36立方分米的圆柱削成一个最大的圆锥，圆锥的体积是（）立方分米，削去部分的体积是（）立方分米。

答案

12；24

选择题

下列各组微粒在指定条件下一定能大量共存的是

A．在pH=1的无色透明溶液中：NH₄⁺、Na⁺、AlO₂^－、NO₃^－

B．同一个集气瓶中：N₂、NO、NO₂、O₂

C．加入Al能放出H₂的溶液中：Cl^－、NO₃^－、Ba²⁺、Na⁺

D．常温下由水电离产生的c(H⁺)、c(OH^－)满足c(H⁺)·c(OH^－)=10^－18的溶液中：Cl^－、NO₃^－、Ba²⁺、Na⁺

完形填空

People often say that the Englishman’s home is his castle. In this sense they mean that the home is very important and 21 . Most people in Britain live in houses 22 flats, and many people own their homes. This means that they can make them individual(个人的); they can 23 them and change them in any way they 24 . In a crowded city the individual knows that he or she has a private space which is 25 for himself or herself and for invited friends.
People usually like to 26 their space. Are you sitting now in your home or in a beach or a train? If you are on the beach you may have spread your 27 around you; on the train you may have 28 your coat or small bag on the seat beside you; in a library you may have one corner or chair which is your own.
Once I was traveling on a 29 to London. I was in a section for four people and there was a table between us. The man on the opposite side to me had his briefcase on the table. There was no 30 on my side of the table at all. I was made rather 31 . I thought he thought that he owned the 32 table. I took various papers out of my bag and put them on 33 ! When I did this he stiffened and his eyes nearly popped out of his head. I had 34 his space ! A few minutes later I took my papers off his case in order to read them. He 35 moved his case to his side of the table. ( Of course , it is possible that he just wanted to be helpful to me !

A．rather than

C．as a result of

A．hesitatingly

B．immediately