问题 选择题

某初中生物兴趣小组的同学在探究“口腔对淀粉的消化作用”课题时,设计的实验方案如下表,下列说法不正确的是(  )

试管编号12345
馒头碎屑或块适量碎屑适量碎屑适量馒头块适量碎屑适量碎屑
唾液有无2mL唾液2mL清水2mL唾液2mL唾液2mL唾液
是否搅拌搅拌搅拌A搅拌搅拌
温度37℃0℃100℃
加入碘液2滴

A.如果该兴趣小组选用1、2号试管进行实验,其实验变量是唾液

B.要探究牙齿的咀嚼,舌的搅拌对馒头的消化作用,应选用1、3 号试管进行实验,那么A 处的处理方法是搅拌

C.观察到3 号试管的实验现象是部分变蓝

D.如果选用1、4、5 号试管进行实验,其探究的问题是唾液淀粉酶发挥作用的适宜温度是多少

答案

答案:B

填空题
阅读理解

Spring is a wonderful season to celebrate rebirth and new life. The long, cold winter is over. The weather is warmer and sunnier. The trees again have leaves and the flowers are blooming. The season represents hope, joy and beauty. At this time, many people think of this classical music piece — Spring, which shows happiness. Italian composer Antonio Vivaldi wrote it in the seventeen hundred.

However, not all songs about spring are happy. This song written and sung by K.D. Lang is about dreaming of spring in cold dark places. She recorded I Dream of Spring in 2008.

Richard Rodgers and Oscar Hammerstein wrote It Might as Well Be Spring for the movie State Fair in 1945. Frank Sinatra sings it. It is a feeling of restlessness or excitement brought on by the coming of spring. Richard Rodgers also wrote Spring Is Here, this time with Lorenz Hart. Ella Fitzgerald sings this song about feeling lonely during this season.

Frank Loesser wrote the sad song, Spring Will be a Little Late This Year. Why has the season been delayed? Because the singer’s lover has left her. Sarah Vaughn released(发行) her version of the song in 1953.

By now you may be thinking, “Enough with the sad songs, already!” Ok, then how about a cowboy song? Gene Autry was one of America’s most famous singing cowboys. He recorded When It’s Springtime in the Rockies in 1937.

And finally, we’ll leave you with a sunny song called Up Jumped Spring. Freddie Hubbard wrote this jazz song in 1977 and Billy Taylor Trio performs it.

小题1: If you are in a bad mood, you’d better listen to _____.

A.Up Jumped Spring

B.I Dream of Spring

C.Spring Is Here

D.Spring Will be a Little Late This Year小题2: It Might as Well Be Spring is a song that ______.

A.is also called State Fair

B.is sung by Ella Fitzgerald

C.has a lonely feeling

D.was written by two people小题3: According to the passage, which of the following is TRUE?

A. Most songs about spring are written by Italian composers.

B. K.D. Lang was good at writing happy songs.

C. Sarah Vaughn sang the song Up Jumped Spring first.

D. Gene Autry was a famous cowboy singer before K.D. Lang.

小题4: Which of the following songs was first written or recorded?

A.Spring.

B.I Dream of Spring.

C.When It’s Springtime in the Rockies.

D.Spring Will be a Little Late This Year.小题5: What’s the purpose of the author to write the passage?

A.Introduce some songs about spring.

B.Introduce some wonderful music.

C.Introduce some famous singers.

D.Express his/ her love to spring.