皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【简答题】
Fruit (1410) Imagine a world without fruit. We wouldn’t be very healthy. We get a lot of important vitamins form eating fruit. We think of fruit primarily as something to eat. 1___ Fruit is part of a flowering plant and it carries the seeds. The purpose of fruit is to protect a plant’s seeds and help them get spread about. Wind and water spread seeds. So do animals when they eat fruit and drop the seeds. 2____ There are two main types of fruit: fleshy and dry. Fleshy fruits are soft and juicy. Pears, bananas and apples are all fleshy fruits. 3____ Grains like wheat and rice, or nuts like chestnuts ( 板栗), are dry fruits. But wait: You’ve eaten oranges and grapes without seeds. How can they be fruits? It’s because people have changed the way they grow fruit. They can now grow seedless fruit. Seedless fruit comes from special plants that are made by combining two varieties of a fruit to form a new variety. These special plants grow and produce seeds. 4____ These plants cannot reproduce themselves. They can make fruit, but the fruit has no seeds. Fruits are a source of substances that keep us alive and healthy. So people make use of fruits for many foods. We make juices from them. We make jams and sweets. 5____ Beer comes from grains and wine comes from grapes, and some particular wines are made from apples, peaches, or other fruits. A. Dry fruits are thin and hard. B. We even make alcohol from fruit. C. But fruit has a purpose quite apart from our needs. D. So these plants produce fleshy fruits. E. Then the seeds grow into new plants. F. But the plants grown from these seeds are seedless.
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【简答题】断裂基因中能够编码氨基酸的序列称为( ),非编码序列称为( )。
【简答题】计算机网络按网络的传输介质分类可以分为()和()两种。
【判断题】个体能力和环境要求之间缺乏适应是导致应激的主要原因.
A.
正确
B.
错误
【简答题】按传输介质分类,计算机网络可以分为( )和( )
【单选题】整理水准测量数据时,计算检核所依据的基本公式是( )。
A.
Σa-Σb=Σh
B.
Σh=ΣH终-ΣH始
C.
Σa-Σb=Σh,h=H终-H始
D.
fh≦Fh
【简答题】计算机网络按传输介质分类,可以分为有线网和 ?
【多选题】注射模塑过程需要需要控制的压力有
A.
锁模力
B.
塑化压力。
C.
注射压力
D.
保压压力
【简答题】注射模塑过程需要需要控制的压力有____和____;
【简答题】计算机网络按传输介质分类,可以分为 _______ 和 _______ 两类。
【单选题】哈达(
A.
B.
hǎ)
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题