共查询到20条相似文献,搜索用时 15 毫秒
1.
2.
3.
每年一度的胸透,是学生体检的“保留节目”,但是,殊不知,孩子这样频繁地接受辐射,可能埋下致癌的祸根;我国明文规定放射检查需屏蔽性腺等特殊部位,但实际操作却如同虚设。多位放射防护专家指出:儿童滥检问题危害最重。他们一致呼吁:儿童每年体检,胸透得不偿失应尽快叫停! 相似文献
4.
用“排除法”解选择题是常用的好方法之一.同学们受解题习惯的影响,遇到选择题,就只想用这种方法.但有些题型看似适合“排除法”,可是在解题时需要对可能存在的各种情况逐项分析推导,费时费力,得不偿失.既要对各项都得推导,我们何不放弃“排除法”直接面对题意,这样可能会找到解题捷径.下面仅举两例有关浮力的单项选择题,供大家参考. 相似文献
5.
赵君 《华夏少年(简快作文 )》2006,(2)
用“排除法”解选择题是常用的好方法之一.同学们受解题习惯的影响,遇到选择题,就只想用这种方法.但有些题型看似适合“排除法”,可是在解题时需要对可能存在的各种情 相似文献
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
陈秋静 《中学语文(读写新空间)》2008,(2)
咖啡没有牛奶的香甜,没有茶的淡雅,没有酒的甘醇。咖啡刚入口,尽是苦涩,然而当你仔细品尝的时候,你才会发现糖份沉淀在最下面,惟有细细品味,才会发现甜。品味母爱,如同品味咖啡。明亮的灯光下,我在奋笔疾书。屋子里很安静,除了"沙沙"的笔摩擦纸张的声音,只有那不间断的、明显放轻的脚步声。 相似文献
16.
I sat with my friend in a well-known coffee shop in a 1)neighboring town of Venice,Italy,the city of lights and water.
As we enjoyed our coffee,a man entered and sat at an empty table beside us.He called the waiter over and placed his order,saying,"Two cups of coffee,one of them there on the wall."
We heard this order with interest and 2)observed that he was served one cup of coffee but he paid for two.When he left,the waiter put a piece of paper on the wall,saying,"A Cup of Coffee."
While we were still there,two other men entered and ordered three cups of coffee,two on the table and one on the wall.They had two cups of coffee but paid for three and left.This time also,the waiter did the same:He put a piece of paper on the wall,saying,"A Cup of Coffee." 相似文献
17.
18.
19.