已知A、B、C、D、E、F、G是初中化学常见的物质,A在常温下是一种无色液体,D

题型:填空题

问题:

已知A、B、C、D、E、F、G是初中化学常见的物质,A在常温下是一种无色液体,D是天然气的主要成分,G是一种重要建筑材料的主要成分,E是一种金属氧化物,与A反应能生成一种常见的碱.它们之间的转换关系如图所示:

(1)写出下列物质的化学式:A______、D______.

(2)写出反应④的化学方程式______.

(3)E在日常生活中用途广泛,请写出其中一点______.

(4)反应③属于______反应(填“化合”、“分解”、“置换”、“复分解”).

(5)B是最清洁的燃料,与其它燃料相比其优点有______.

考点:物质的鉴别物质的推断
题型:填空题

读短文,用所给动词的适当形式填空。

     The only language that seems easy to learn is the mother tongue. We should remember that we all learned

our own language well when we were children. If we could learn English in the same way, it would not seem

so difficult. Think of what a small child does. He listens to what people say. He tries what he hears.

     So it is hard to say that learning English is easy. We must do a lot of practice. And practice needs great

effort and takes much time. Good teachers, records, tapes, books, and dictionaries will be helpful, but they

cannot do the student's work for him.

读短文,用动词的适当形式填空。

     It 1_____ (seem) easy to learn our mother tongue. Why is that? It is only because we learned our tongue

when we were little. We 2_____ (listen) what the others said. And tried 3_____ (do) what we heard. We now

4_____ (not have) enough time for the language study. So 5_____ (learn) English isn't very easy.

题型:填空题

副交感神经低级中枢位于脊髓的()。

A.全部骶节段

B.骶1~骶3节段的侧角

C.全部腰节段的侧角

D.腰2~腰4节段

E.骶2~骶4节段

题型:填空题

工业项目土地利用系数是指( )。

A.建筑占地面积/厂区占地面积

B.(建筑占地面积+厂区道路占地面积)/厂区占地面积

C.(建筑占地面积+厂区道路占地面积+工程管网占地面积)/厂区占地面积

D.(建筑占地面积+厂区道路占地面积+工程管网占地面积+绿化面积)/厂区占地面积

题型:填空题

近代史上,曾割占中国领土的国家有

①俄国②法国③英国④日本  [ ]

A.①②③    

B.①②④  

C.①③④    

D.②③④

题型:填空题

诊断急性心肌梗死时特异性较高的检查是()。

A.超声心动图

B.血常规及血沉

C.天冬氨酸转氨酶(谷草转氨酶)

D.放射性核素心肌显影

E.同功酶CK-MB和CTNI

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