20世纪70年代,中国城乡居民的衣着主要是单调的“灰蓝黑”。进入90年代,人们的服饰变得丰富多彩起来,日益多元化、个性化。这一变化反映的实质是  (    )

下列关于孟德尔遗传规律的得出的说法，不正确的是（　　）

根据句意及首字母提示完成单词

① Paper can be r____. We'd better not throw it away.

② It is important to try to save e____.

③If we don't protect our e____, the earth will be destroyed.

④ Our teacher tells us to collect r____ plastic bags.

⑤ Gold, silver and iron are all m____.