传统农业的劳动卫生问题是（） A.高温中暑 B.急、慢性骨关节损伤 C.有害气体 D

下列选项中的原始居民，位于长江流域的是[ ]

A．北京人

B．山顶洞人

C．半坡原始居民

D．河姆渡原始居民

Plant scientists consider them as fruit. Most other people think of them as vegetables. Whatever you call tomatoes, there are many different kinds of this popular and healthy food.

There are two groups of the plants. Small tomato plants grow to about one meter. They can be planted rather close together. Some short kinds do not require special care and are often gotten crop by machines. Large tomato plants can grow over two meters tall. They also produce larger fruits.

People who grow only a few plants can place wire cages around each one. The cage can be made of wire fence material. The cage helps the plant grow taller and produce a better crop.

Tomatoes often need extra calcium (Ca), or the fruits may be ruined. Add lime to the soil can solve this problem. Dry lands may also ruin the fruits. Tomatoes need water regularly. The soil should never dry out completely. Dried grass or leaves placed around the plant can help hold water in the soil and stop the growth of unwanted plants.

Tomatoes are native to South America. The tomato is a member of the potato family. The leaves of the plant are poisonous, like the leaves of its relatives. Before the 18th century, people grew tomatoes only as pretty plants. They called the bright red fruit a “love apple”, but would not eat it.

小题1:Which of the following is right about the small tomato plants?

A. They can grow to about 2 meters.    

B. They can’t be planted close together.

C. Some of them don’t require special care.

小题2:People place wire cages around the plant in order to ___________.

A. protect the plant from being taken by others.

B. help the plant grow taller and produce a better crop

C. keep the plant from being eaten by animals

小题3:The underlined word “ruin” probably means “___________”.

A. grow     B. destroy      C. stop    

小题4: People often give tomatoes extra calcium by ___________.

A. adding lime to the soil          B. watering the plant regularly

C. putting dried grass around the plant

小题5:What can we learn from the passage?

A. Tomatoes are native to North America.

B. The leaves of the plant can also be eaten.

C. Americans began to eat tomatoes from the 18th century.

“十二五”期间重点实施“八大工程”包括______。

A．转型升级工程

B．科技创新工程

C．文化建设工程

D．民生幸福工程

外国人无力缴纳罚款依法改处行政拘留的，罚款不再执行。

室分中有一种干扰，明显的随话务变化，此类干扰的名称是（）

A.互调干扰

B.阻塞干扰

C.有源干扰

D.拖尾干扰