钢球的大小尺寸主要取决于（）。A、磨机的规格 B、矿石的硬度 C、矿石性质及粒度组成

《中华人民共和国药品管理法实施条例》规定，医疗机构购进药品必须有（）。

A.签订的购进合同

B.编制采购计划和记录

C.价格清单记录

D.经过检验的记录

E.真实、完整的药品购进记录

Plants are very important living things. Life could not go if there were no plants. This is because plants can make food from air, water and sunlight. Animals and man cannot make food from air, water and sunlight. Animals get their food by eating plants and other animals. So animals and man need plants in order to live. This is why we find that there are so many plants around us.

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

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

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

小题1:The main idea of the passage is that      .

A．plants are important for life

B．plants cannot grow without air

C．there are many plants around us

D．we cannot live without water小题2:Which of the following is NOT TRUE?

A．Plants can be divided into main types: flowering plants and non-flowering plants.

B．All fruits have seeds in them.

C．Seeds are protected by the fruits.

D．Some plants grow from spores.小题3:The underlined word "non-flowering" means        .

A．开花的

B．有花的

C．多花的

D．不开花的小题4:In “shady places” there is        .

A．a lot of sunshine

B．a lot of water

C．no water

D．little sunshine

两个人一碗菜，三个人一碗肉，四个人一碗汤，今多来了三个人用了65碗，求共有______个人．

男性，45岁，主诉头痛、头晕3个月，颈侧屈或后伸时头晕加重，猝倒3次。有时视物不清，椎动脉造影有部分梗阻，最大可能是

A．美尼尔综合征
B．粘连性蛛网膜炎
C．椎动脉型颈椎病
D．脊髓肿瘤
E．体位性眩晕

在系统软件中，必须首先配置操作系统。 ( )