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国家统计局发布的信息显示，河南省粮食产量连续五年创历史最高记录。河南省毫不动摇地抓好粮食生产，实施优质粮食产业工程，为国家粮食安全做出新贡献。（16分）
（1）图中表示京九铁路的字母是 。（2分）
（2）简述河南省成为“中原粮仓”的有利自然条件。（6分）
（3）简要说明河南省连续五年粮食产量创历史新高的主要原因。（4分）
（4）我国人均耕地不足世界人均水平的1/3。简述为了保证我国粮食安全应采取的措施。 查看习题详情和答案>>
（1）为了保证实验效果应选择较 ▲ （填薄或厚）的玻璃板．
（2）实验时玻璃板a应与水平桌面 ▲ 放置．
（3）沿水平桌面移动蜡烛c前，应先将蜡烛 ▲ 点燃．
（4）该实验最好在 ▲ （填较暗或较亮）的环境中进行．
（5）如果在蜡烛像的位置放一个光屏，光屏上_▲____承接到像（选项“会”或“不会”），这说明平面镜所成的像是__▲____像（选填“虚”或“实”）． 查看习题详情和答案>>
阅读下面短文，根据短文内容回答问题。
Recently, more and more people pay attention to eating healthily. Some food additives(添加剂) are used to make different kinds of foods. Some of them can make the food more delicious and some of them can make it colorful. But lots of chemicals are used to produce what we eat every day.
Sudan red is a kind of chemical that factories used it to dye cloth, make the shoes brighter. But some people produced salted duck eggs with it . However, it isn’t a kind of food additive. The food made from Sudan red makes it easier to cause cancer. Melamine(三聚氰胺) is another kind of chemical that are banned(禁止). It’s white crystal(晶体), which was discovered by a German chemist called Sustus Von Liebig in 1834. Melamine can be used to make paper, medicine and woods, ect. But nobody can imagine that some people used it as a material of milk powder(粉末). Because of melamine, it’s reported that 4 babies died and more than 50 thousand babies are affected since 2008. Sanlu, a famous milk powder factory was closed. What’s worse, milk powder with melamine appeared in 2011 again. Problems of food safety, for example, poisonous rice, lean meat powder(瘦肉精) and plasticizers(塑化剂) are becoming more and more serious.
Fortunately, lots of laws have been made to make the solution(解决方法) better. We think we will eat more healthily in the future.
1.Can the food additives make the food colorful and more delicious?
2.What is Sudan red?
3. When was melamine discovered?
4.请将划线句子翻译成汉语。
5.为了保证食品安全，避免类似事件发生，请你用英语给负责食品安全的相关部门提出建议（只需一条即可）。
查看习题详情和答案>>
国家统计局发布的信息显示，河南省粮食产量连续五年创历史最高记录。河南省毫不动摇地抓好粮食生产，实施优质粮食产业工程，为国家粮食安全做出新贡献。（16分）
（1）图中表示京九铁路的字母是 。（2分）
（2）简述河南省成为“中原粮仓”的有利自然条件。（6分）
（3）简要说明河南省连续五年粮食产量创历史新高的主要原因。（4分）
（4）我国人均耕地不足世界人均水平的1/3。简述为了保证我国粮食安全应采取的措施。 查看习题详情和答案>>
Recently, more and more people pay attention to eating healthily. Some food additives(添加剂) are used to make different kinds of foods. Some of them can make the food more delicious and some of them can make it colorful. But lots of chemicals are used to produce what we eat every day.
Sudan red is a kind of chemical that factories used it to dye cloth, make the shoes brighter. But some people produced salted duck eggs with it . However, it isn’t a kind of food additive. The food made from Sudan red makes it easier to cause cancer. Melamine(三聚氰胺) is another kind of chemical that are banned(禁止). It’s white crystal(晶体), which was discovered by a German chemist called Sustus Von Liebig in 1834. Melamine can be used to make paper, medicine and woods, ect. But nobody can imagine that some people used it as a material of milk powder(粉末). Because of melamine, it’s reported that 4 babies died and more than 50 thousand babies are affected since 2008. Sanlu, a famous milk powder factory was closed. What’s worse, milk powder with melamine appeared in 2011 again. Problems of food safety, for example, poisonous rice, lean meat powder(瘦肉精) and plasticizers(塑化剂) are becoming more and more serious.
Fortunately, lots of laws have been made to make the solution(解决方法) better. We think we will eat more healthily in the future.
【小题1】Can the food additives make the food colorful and more delicious?
【小题2】What is Sudan red?
【小题3】 When was melamine discovered?
【小题4】请将划线句子翻译成汉语。
【小题5】为了保证食品安全，避免类似事件发生，请你用英语给负责食品安全的相关部门提出建议（只需一条即可）。 查看习题详情和答案>>