五花龙骨的鉴别特征是（）
A.含氯化亚汞，为白色有光泽的鳞片或雪花状结晶，遇光色变黯
B.含氯化亚汞，为白色雪花状结晶，气香
C.不规则的块状，表面灰白色，夹有红、黄、蓝、黑等颜色的纹理，吸湿性强
D.不规则的缺状，表面灰白色，夹有红、黄、蓝、黑等颜色的纹理，无吸湿性
E.不规则的块状，表面灰白色，多光滑，无臭无味，舔之粘舌
参考答案：C
In China, a lot of food is wasted(浪费) every year and the waste food is enough for ____ people. The food is wasted in restaurants, at home and in school,etc. In restaurants or at home, people often order or cook _____ food. But they can’t eat it up. When they go out of a restaurant, full and happy, they never look back ______ the uneaten food on the table again. Should Chinese consumers(消费者)feel______ for the terrible waste? In schools, we can often see a lot of students ______ food away after meals and they only eat the food they like. Everyone is supported to (被期望) to have enough food to eat. However, in some places, the food is so ______ that a lot of people die from hunger. China has tried hard to solve ____ of hunger over the past thirty years, the job is not finished yet. Food is important to us all. We ____ live without food. So ______ is necessary (必要的) for us to love food and try to eat up everything on our plates. When we eat in restaurants, we should pack up the leftovers(剩菜剩饭). We also need to tell other people to stop ______ food as soon as possible.
|