问题 选择题

一般不提倡青少年长期饮用纯净水,这是因为(  )

A.纯净水不含营养素

B.纯净水中几乎不含无机盐

C.纯净水中不含氧气

D.纯净水的pH过大

答案

A、纯净水中含营养素但几乎不含矿物质;故A不正确;

B、纯净水中几乎不含矿物质,对青少年健康不利;故B正确;

C、纯净水中也含有氧气;故C不正确;

D、纯净水呈中性,青少年不宜长期饮用纯净水;故D不正确.

故选B.

单项选择题

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

A garden that’s just right for you

Have you ever visited a garden that seemed just right for you, where the atmosphere of the garden appeared to total more than the sum(总和) of its parts?    36   . But it doesn’t happen by accident. It starts with looking inside yourself and understanding who you are with respect to the natural world and how you approach the gardening process.

●37  

Some people may think that a garden is no more than plants, flowers, patterns and masses of color. Others are concerned about using gardening methods that require less water and fewer fertilizers(肥料).    38   . However, there are a number of other reasons that might explain why you want to garden. One of them comes from our earliest years.

●Recall(回忆) your childhood memories

Our model of what a garden should be often goes back to childhood. Grandma’s rose garden and Dad’s vegetable garden might be good or bad, but that’s not what’s important.    39   --how being in those gardens made us feel. If you’d like to build a powerful bond with your garden, start by taking some time to recall the gardens of your youth.    40    then go outside and work out a plan to translate your childhood memories into your grown-up garden. Have fun.

36()

A. Know why you garden

B. Find a good place for your own garden

C. It’s our experience of the garden that matters

D. It’s delightful to see so many beautiful flowers

E. Still others may simply enjoy being outdoors and close to plants

F. You can produce that kind of magical quality in your own garden, too

G. For each of those gardens, writer down the pest memory you have

单项选择题