要的是正确度,设等腰直角三角形ABC的腰长为a,以此等腰三角形斜边上的高AD为折痕,使三角形ABD和三角形ACD折成互相

（回答正确度80%我会加悬赏金的） 一定要自己回答(直接写答案,最好把自己的思路写上.）（例：（1）e··
1） Now almost every family has a TV and almost everyone (1)e watching TV.In fact,TV has already become part of our (2)l .Most people,young or old,are likely to (3)s in front of a TV set in the evening instead of talking with each other or doing (4）a else.
TV has (5)m advantages(优点）.For example,it can ofter us the latest news about what are happening in every corner of the world ,it can open our eyes and enlarge our knowledge .in a word ,it helps us to (6)l more about the word
however,italso has some disadvantages .some people (7)s too much time watching tv .this affects their life and work .to children ,watching too much tv may be (8)b for their eyes ,so we should control(控制）the (9)t of watching tv
we are look (10)f to further improvement of tv to meet our growing needs

一道关于电子测量技术的题目,
设某待测量的真值为土0．00,用不同的方法和仪器得到下列三组测量数据.试用精密度、正确度和准确度说明三组测量结果的特点：
① 10.10,l0.07,10.l2,l0.06,l0.07,l0.12,10.11,10.08,l0.09,10.11；
② 9.59,9.7l,1 0.68,l0.42,10.33,9.60,9.80,l0.21．,9.98,l0.38；
③ 10.05,l0.04,9.98,9.99,l0.00,10.02,10.0l,999,9.97,9.99.

这个电表怎么算电费?
我这个是单项式电表,只有五位数,最右边一位是黑色但是有刻度,那么可以把它理解为个数还是小数?它正确度数是多少?

几道英语关于代词的语法题目.
还有请尽量保持正确度啊。
因为真的不是很懂所以才问的，请稍为详细一点哈～
1.Scientists have given a warning to reduce the amount of lead in paint especially ( ) used on children's toys and furniture.
A.that B which is C.it is D.one
我的解题：我选择了B，因为认为lead作为主语然后应该是被动语态的。
所以是be used。
2.In Betty's eyes,her teacher was just her best friend,most trusted person or ( ) she would turn to in time of trouble.
A.when B.whom C.one D.who
我的解题：我选了B，因为觉得这里的代词应该是指代寻求帮助的人（宾语）
正确答案是C
3.I’d like something to read during the journey,and (anything) will do.
我的解题：根本就没有读懂句意。
4.A good book is (one ) which benefits readers.
我的解题：我用的是somthing，和one有什么区别（这题请详细回答和分辨，）