问题 填空题

指出下列物质中,哪些是单质?哪些是混合物?哪些是氧化物?哪些是化合物?哪些是金属单质?哪些是非金属单质?哪些是稀有气体?(填序号)

①氧气②糖水③空气④氧化镁⑤过氧化氢⑥氖气⑦铁⑧二氧化硫⑨硫⑩铝二氧化锰高锰酸钾

(1)单质_____________

(2)金属单质______________

(3)非金属单质______________

(4)稀有气体_____________

(5)混合物____________

(6)氧化物______________

(7)化合物_____________

答案

(1)①⑥⑦⑨⑩

(2)⑦⑩

(3)①⑥⑨

(4)⑥

(5)②③

(6)④⑤⑧

(7)④⑤⑧

判断题
阅读理解

Let’s pretend we’re sailing down the Rhine River on a pleasure boat. The Rhine is one of the main waterways of Germany, and the river traffic is heavy. It’s interesting to watch the many boats going up and down the river. But the river traffic is not nearly so interesting as the beautiful scenery along the banks and hillsides. The boat is passing many old castles. We can see people working in the vineyards (葡萄园) on the hillsides. There are vineyards as far as the eye can see. Wine from the Rhine Valley is famous all over the world.

Suddenly our boat slows down and begins to turn a little. We are coming to a sharp bend in the river. On our right we can see a rocky cliff over 400 feet high. At first it looks quite ordinary, but there is nothing ordinary about it. There are many stories, poems, and songs about the cliff. We are looking at the Lorelei. Then someone on the boat begins to sing in German, the song of the Lorelei. It is a song about a beautiful siren (妖妇) who has lured(引诱) many sailors to their deaths.

The siren is supposed to sit on the rock combing her long golden hair and singing. The sailors who hear her forget to steer(掌舵), and the current of river hurls (掀翻) their boats on the rocks and dashes(猛撞)them to pieces.

Soon other people on the boat begin to sing. The beautiful song adds to special magic to the moment, and you begin to realize why so many people have made this trip down the Rhine to see the rock of the Lorelei.

小题1:The most interesting thing to those who are sailing down the Rhine River on a pleasure boat is     .  

A.to watch many boats going up and down the river

B.to see the beautiful scene along the banks and hillsides

C.to hear a song about beautiful siren

D.to see a beautiful siren combing her golden hair小题2: Which of the following is famous all over the world?

A.The Rhine River.

B.The River Traffic.

C.Wine from the Rhine Valley.

D.The Lorelei.小题3:We can see a rocky cliff over 400 feet high     .

A.on our right when coming to a sharp bend

B.on the Rhine hillsides

C.from the Rhine Valley

D.on the boat小题4: The song of the Lorelei is about     .

A.The Rhine wine

B.a rocky cliff

C.the beautiful scenery along the Rhine River

D.a beautiful and dangerous siren