正确答案: B

溶液是均一的、稳定的混合物

题目：下列说法中正确的是（   ）。      

解析：B

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举一反三的答案和解析：

[单选题]If you ___________ in the exam, you will let your parents down.

fail

[单选题]MrBrowngotwetandhetriedto_________thesweater.

takeoff

[单选题]A:根据对话内容从方框内所给的选项中选出最佳答案，使对话完整，符合逻辑，句义通顺。注意：有多余选项。A: Excuse me, 81

Are you Miss White from New York?

[多选题]AGood morning. The program today is about music. The word “music” comes from the Greek word “muse”. The Muses are the goddesses of the arts. Music is only one of the arts. It is like the spoken language,but is uses sounds. Today's program brings together music from different corners of the world. Who invented music？ Who sang the first song？ No one knows exactly the answers to these questions. But we know that music plays an important part in almost everyone's life. Babies and young children love to hear people singing to them. When they are a little older, they like to sing the songs they have heard. When children go to school,their world of music grows. In the middle grades students take music lessons. When they reach high school,they become interested in listening to pop music.

SO ON. MUSI

[单选题]Thereadingroom________veryquiet.Ienjoyreadingbooksthere.

is

[单选题]2． — ________ I fill in the check-in form. right now，sir?—No，you needn't． You can complete it this afternoon．

Must

解析：2．D【解析】情态动词must除了表示推测外，它还有 “必须”的意思，它引导的一般疑问句进行否定回答时，用needn’，不必”，mustn -t表示“禁止”。故答案为D。

[单选题]12．

Class Four，Grade One

解析：12．D【解析】英语中表示单位或地址的名词的排列顺序通常是由小及大。同时要注意首字母要大写。

[单选题]28． In the letter Shelia talked about________ possible reasons(原因) for Alice's problems．

four

解析：28.A【解析】在信中，Shelia谈了引起Alice问题的四种可能的原因，这从第一段的最后一句，第二段的第一句，第三段的第二句和第四段的第一句可以看出。

[单选题]4g氧气可与（     ）g氢气完全反应生成水。

0.5