下列哪项不是植物果实适合于传播的目的（ ）
A．有些果实颜色鲜艳
B．为人提供食物
C．表面有刺或黏液
D．表面有翅或毛
被子植物的种子外面有果皮包被着，被子植物在繁殖的过程中能受到更好的保护，适应环境的能力更强，适于生活在不同的环境中；其次有些果实的表面有翅或毛，适于随风传播；有些果实颜色鲜艳，有香甜的浆液或果肉，能诱使动物来吃，利于播种．因此被子植物是植物界中最高等的一个类群，其种类最多，分布最广．可见B正确．
故选：B
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| Are your table manners much better when you are eating at a friend's home or in a restaurant than they are at your own home? Probably so. 1 you are aware that people judge you by your table manners. You take special pains when you are eating 2 . Have you ever stopped to realize how much less self-conscious you would be on such occasions if 3 table manners had become a habit for you? You can make them a habit by 4 good table manners at home. Good manners at mealtimes help you and those around you to feel 5 . This is true at home as much as it is true in someone else's home or in a restaurant. Good 6 make meals more enjoyable for everyone at the table. By this time you probably know quite well what good table manners are. You 7 that keeping your arms on the table, talking with your 8 full and wolfing down your food are not considered good manners. You know also that if you are mannerly, you say "please" and "Thank you" and ask for things to be passed to you. Have you ever thought of a pleasant attitude as being 9 to good table manners? Not only are pleasant mealtimes enjoyable, but they aid digestion. The dinner table is a 10 for enjoyable conversation. It should never become a battleground. You are definitely growing in social maturity (成熟) when you try to be an agreeable table companion. | ||||
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