直径114mm的管件，定位焊焊缝通常为（）。A.1处 B.2处 C.3处 D.4处

根据短文内容，判断下列句子是否正确，对的涂（A），错的涂（B）。

Plants are very important living things. Life could not go if there were no plants. This is because plants can produce food from the air, water and sunlight. Animals and man cannot produce food from the air, water and sunlight as plants do. Animals get their food by eating plants or other animals which eat plants. So animals and man need plants in order to live.

If you look carefully at the plants around you, you will find that there are two kinds of plants: flowering plants and non-flowering ones.

Flowering plants can make seeds. The seeds are protected by the fruits. Some fruits have one seed. Some have two, three or four. Some have many. But a few fruits have no seeds at all. An example of a fruit without seeds is the banana.

Most non-flowering plants don’t grow from seeds. They grow from spores (孢子). Spores are very, very small. Some spores are so small and light that they can float in the air. We may say that spores are quite the same as the seeds. When these spores fall on wet and shady places, they usually grow into new plants.  

小题1:Plants are very important to life.

小题2:Both animals and plants can produce food from the air, water and sunlight.

小题3:Banana is a fruit that does not have seeds.

小题4:All the flowering plants have many seeds.

小题5:Spores can grow into new plants wherever they fall.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

据“保护长江万里行”考察队统计，长江流域年废水排放量已达1640000万吨！用科学记数法表示这个数是（     ）万吨，可见治理长江污染已刻不容缓！

下列哪种酶在肝脏含量最少（）

A.CK

B.AST

C.LDH

D.ALT

E.γ-GT

理想与人生的关系，错误的观点（）

A.理想越崇高，人生越丰富

B.理想层次越高，它所产生的激励作用越大

C.理想健康，人生健康，理想低俗，人生堕落

D.理想是空气，失去他就失去生命

CTAIS1.1系统中定义了哪些常用功能键，它们的含义各是什么？