题目内容：

    Music has a great effect on everyone. But does music affect plants, too? People have been experimenting with music for almost three decades. From school-level projects to higher-level scientific experiments, the effect of music on plants has been a confusing and debatable topic.

We know music is sound and sound is nothing more than a wave. Plant growth is a result of the cell division that takes place within the cells. But why is music associated with plant growth? In humans, music has a strong effect on our health and mood, and over the years, people have claimed that the same effect has been observed on plants, too. Plants are sensitive by nature, and many people claim that they have feelings just as humans do. There are stories about plants shedding tears. Although scientists do not support these as facts, these myths have led them to take up various experiments on plants.

Various studies have proved that plants respond to acoustic (音响的) energy. It increases their rate of growth and their size, and influences their overall health. Dan Carlson, after a thorough study over a span of many years, has reached a conclusion that music helps plants absorb nutrients(养分) more efficiently.

It took Dan about fifteen years to develop a foliage spray (叶面喷剂) that is used beneficially with the sound frequencies. Carlson calls this spray “Sonic Bloom”. His findings have proved to be beneficial for countless farmers and have resulted in－according to Guinness Book of World Records－the largest indoor plant on record.

The Purple Passion was treated with the Sonic Bloom process. It grew to be 1,300 feet tall and was alive even after 25 years. Its normal lifespan(寿命), however, is 18 months and it grows not more than 18 feet tall. The book, Secret of the Soil, writes about Sonic Bloom and its results. Sonic Bloom is also sold in the market.

1.What inspired scientists to experiment with plants?

A.The effects of music on humans.

B.Plants are sensitive by nature.

C.The cell division taking place within the cells.

D.People’s debatable opinion of the effect music has on plants.

2.What is the main idea of Para. 3?

A.Nutrients are important to plants.

B.Music can have some good effects on plants.

C.How the rate of growth of plants can be improved.

D.What kinds of music can contribute to the growth of plants.

3.What did Dan Carlson develop?

A.A spray called “Sonic Bloom”.

B.A method to grow larger plants.

C.A special plant that grows very fast.

D.Acoustic energy that plants respond to

4.Why is the Purple Passion included in Guinness Book of World Records?

A.It is the oldest indoor plant.

B.It is the largest indoor plant.

C.It gives off the most pleasant smell.

D.It can grow in the toughest conditions.