问题 问答题

通过一年的化学学习,你已经掌握了常见仪器的使用方法.请从下列仪器中选择适当的仪器,将其编号写在相应的空格处.

a.胶头滴管     b.漏斗      c.10ml量筒  d.25ml量筒    e.烧杯

f.细口瓶       g.玻璃棒    h.药匙       i.坩埚钳       j.酒精灯

(1)取用粉末状固体用______;  (2)氢氧化钠溶液存放在______;

(3)过滤操作中用到的仪器______;  (4)做镁带燃烧实验时用到的仪器______;

(5)量取15.0ml水用到的仪器______;  (6)将硫酸铜粉末溶解于水中______.

答案

(1)粉末状固体药品取用时需要使用药匙;

故答案为:h;

(2)氢氧化钠溶液应放在细口瓶内保存;

故答案为:f;

(3)过滤操作需要使用玻璃棒、漏斗、烧杯、铁架台等仪器;

故答案为:beg;

(4)做镁带燃烧实验时需要使用坩埚钳夹住镁带,并放在酒精灯上引燃;

故答案为:ij;

(5)量取15.0ml水需要选择25mL的量筒,为精确量取还需要使用胶头滴管以便逐滴滴加;

故答案为:ad;

(6)将硫酸铜粉末放入烧杯中,并用玻璃棒不断搅拌,直到固体完全溶解;

故答案为:eg.

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

填空题