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问题 实验题

某课外小组利用如图所示的装置，进行氧气的制取和化学性质的实验．请回答下列问题.

（1）写出仪器①的名称 _________ ．

（2）写出制氧气的文字表示式 _________ ．

（3）A装置中产生氧气后，在B装置中，进行氧气性质的实验，请完成实验报告.

（4）在B装置中，加入少量的水，其作用为 _________ ；利用上述整套装置进行氧气制取和性质试验的最主要优点为（写一条即可） _________________________ ．

答案

（1）铁架台；

（2）过氧化氢水+氧气；

（3）氧气与铁丝反应现象：剧烈燃烧、火星四射、生成一种黑色固体；  反应的文字表示式：铁+氧气四氧化三铁；   氧气与硫粉反应现象：发出明亮的蓝紫色火焰，生成一种有刺激性气味的气体；   反应的文字表示式：硫+氧气二氧化硫；

（4）防止生成的熔融物温度很高，直接溅落瓶底会炸裂瓶底；  节约能源．

综合

读东西半球图，回答下列问题。

（1）将图中数字所代表的大洲的名称填写在下面的空格内。①_________②_________③_________④_________⑤_________ ⑥_________ ⑦_____________

（2）将图中字母所代表的大洋的名称填写在下列的空格内。A____________B____________C_____________D_______________

（3）七大洲中面积最大的是。同为一个大陆的大洲是______ 和_______。

（4）四大洋中面积最小的是______。介于五大洲之间的大洋是_________ 和__________。跨经度最多的大洋是__________。

（5）按南北半球来说，海洋面积广阔的是____________ 半球。

（6）我国位于__________。
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填空题

Washington: The Bush administration has ________for the first time that it may be willing to ________a multinational force in Iraq to operate under the ________of the United Nations as long as ________by an American. The idea was described by Richard L. Armitage, the deputy secretary of state, as just "________" in discussions at the United Nations. It was first ________publicly last week by Kofi Annan, the United Nations’’ secretary general.Mr. Armitage’’s remarks, made ________to regional reporters and released by ________today, represent ________in course for the administration, which has until now insisted that all ________matters in Iraq remain under total American control. Allowing the United Nations ________would be intended to win the support of the Security Council for ________authorizing the ________ occupation of the country.In his remarks, Mr. Armitage ________to discuss the plans________, saying, "I don’’t think it helps to ________publicly right now." But he described the arrangement under consideration as "a multinational force________" in which "the American would be the U.N. commander."On Monday, Defense Secretary Donald H. Rumsfeld was asked whether he could ________American troops fighting_______. His answer: "I think that’’s not going to happen." But he went on to rule out only "________" meaning by the United Nations, whose troops wear blue helmets over a peacekeeping force in Iraq.
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