粮食是关系国家经济安全的重要战略物资，粮食安全与社会的和谐、政治的稳定、经济的持续发展息息相关。为保障粮食安全，需要增加粮食供给，下列选项中正确的是（  ）

①加大科技投入 大力发展转基因技术 提高谷物生产能力 增加粮食供给

②降低人民币汇率 降低粮食进口成本 提高粮食进口量 增加粮食供给

③加大对农业的财政补贴 增加种粮农民收入 提高粮食生产积极性 增加粮食供给

④深化农村土地制度改革 引导土地承包经营权有序流转 发展农业适度规模经营 增加粮食供给

下列有关生物技术发展对人类影响的叙述，不正确的是（　　）

   Hangzhouhua (杭州话)：use it or lose it
   There are about 6.000 languages in the world and some experts say that as many as half of these languages will disappear(消失) in the next one hundred years. Will Hangzhouhua be one of ____ ? It's a ____  that more people are asking.
   In China, Putonghua is the official language. That ____  it's the language of government, business and the media (媒体). And it's also the language that is____  in schools.
   Hangzhou is a special city. It used to be the capital of Wu and Yue States in the 10th century during the Five Dynasties period. Now it is modern, fashionable and also beautiful. And Hangzhouhua shows that by being modern, fashionable and beautiful.
   Young people still speak Hangzhouhua but not as ____  as their parents and grandparents. They are under more and more pressure to speak Putonghua. So the language is being used____  often in everyday life. Some people want to keep the language from disappearing completely ____  building museums and having cultural festivals to save it. But a language isn't a painting ____ a book. It's a living thing and you ____  use it or lose it.
   If people ____  using it in their daily lives, a museum or a festival will not help. It will be lost forever, like the Yangtze River dolphin.

2012年3月20日，新疆出现今年首次沙尘暴，图中的天气符号表示沙尘暴的是（　　）

根据解释，写词语。

像晴朗的天空的颜色。____