Bamboo is a giant grass that grows in warm places. It has many uses. Everything—from chairs and fishing rods to basket and paper can be made from it. And that’s not all. It can be eaten, too. People in China like bamboo shoots very much. They think the bamboo shoots are a delicious vegetable for parties and meals.

In many parts of Asia, bamboo shoots are a favorite food. The winter shoots are the best because they are soft, with a white and green color. Usually they are boiled in water with some salt. Spring shoots are darker and harder, so they take longer to cook. But they are cheaper than winter shoots.

Fresh bamboo shoots are seldom found outside bamboos’ hometown. But people in other places can buy bamboo shoots, too. These shoots are kept in bottles and cans. They need no cooking and are almost as good as fresh bamboo shoots.

小题1:Winter shoots_________.

A．taste better

B．have a lighter color

C．take less time to cook

D．all of the above小题2:Fresh bamboo shoots are easily found in_________.

A．Asia

B．Europe

C．America

D．Australia小题3:Bamboo shoots kept in cans_________.

A．need no cooking before eating

B．are sweet

C．can be made into chairs and tables

D．are used to make rope

阅读以下说明，回答问题1-4。
现有这样一个关系，用来表示某工厂工人家庭的信息。记录每个工人的工作证号、姓名和家庭住址，还包含他/她的每个孩子的身份证号、姓名和年龄，以及他／她所拥有的每部电话的电话号码和型号。
已知：有一些人可能有很多部电话，这些电话可能是同一型号，也可能不是同一型号；有一些人没有电话；如果某人有电话，他的每部电话都有一个电话号码。有一些人可能有很多个孩子，有一些人没有孩子。
初步设计的关系模式如下：R(身份证号，姓名，家庭住址，H身份证号，H姓名，H年龄，电话号码，型号)，其中“H身份证号，H姓名，H年龄”分别是孩子的身份证号、姓名和年龄。