①如图②,线段OA1交线段AB于点M,线段OP1交线段AB于点N,当△OMN为等腰三角形时,求点A1的坐标;
②直线OA1交直线AB于点M,直线OP1交线段AB于点N,当△OMN为等腰三角形时,求的度数(直接写出结果即可).
There are many different kinds of love. For me there is a kind of special love,which I call “soft love”. Now I'd like to thank my parents for giving me so much soft love,especially my father. He has a special way of communicating with me.
My father works at a university as a teacher. He is very strict with students. He devotes (把……奉献)himself to his work,all of his students love him. At home he is both a good husband and a good father. He is strict with me,too,so I am afraid of him. There is one thing that I will never forget.
At the end of the second term of senior one,my scores were lower than ever before,I was very worried about it. My father came to my room and saw the report card,at that time,I was afraid that my father would scold (责骂)me as usual. But surprisingly,he left the room without any remarks (话语).I was frightened (害怕的).
The next day,when I got up,I found a letter. I opened it,it was written by my father,“Dear daughter, I know that studying is hard work,but you won't give it up,will you? I believe that you can be the best. Now I want to give you three pieces of advice. 1. Where there is a will,there is a way. 2. Practice makes perfect. 3. It's no use crying over spilt milk.” After reading the letter,I couldn't say a word. So I wrote,“Father,I can do it! Thank you!”
I think that the love between my father and I is special love that brings us even closer!
化学就在我们身边,它与国家政策、工农业生产和人们生活紧密相关。
(1)“节能减排”是我国的重要国策,下列气体中会引起“温室效应”,属于“减排”对象的是(填序号)。
A.N2 B.CO2 C.O2
(2)磷酸二氢铵(NH4H2PO4)可增强农作物的抗旱能力,这种化肥能显著提高土壤中元素含量,帮助植物生长。
(3)把创建成国家环保模范城市的实施,有助于改善我们的居住环境,这是因为绿色植物能吸收CO2 , 并释放出O2 , 反应式是6CO2+6H2OX+6O2 , 其中X的化学式为。
(4)环保部门常用I2O5测定空气中CO污染的程度,其中碘(I)元素的化合价是。
西瓜无土栽培营养液配方(用量单位:g/L) | ||||
Ca(NO3)2 | KH2PO4 | MgSO4 | K2SO4 | FeCl3 |
100 | 25 | 25 | 25 | 2.5 |
③推动社会形成崇德尚义、见贤思齐的良好风气 ④推动社会形成我为人人,人人为我的社会氛围,不断提升公民道德素质
李大钊 |
陈独秀 |
我们青年应该到农村去,……中国是一个农业国,大多数的劳工阶级就是那些农民,他们若是不解放,就是我们国民全体不解放…… |
世界上是些什么人最有用最贵重呢?……我以为只有做工的人最有用最贵重。 |
中国者,中国人之中国也,国之不在,民于何有,民之泯灭,党将焉传。……谓宜立下决心,接受张杨二氏主张,停止正在发动之内战,……举内战之全军,立即开赴晋绥,抗御日寇,化黑暗为光明,变不祥为大庆。
——红军将领关于西安事变致国民党国民政府电 1936年
组别 | 1 | 2 | 3 | 4 |
产率 | 75% | 83% | 88% | 72% |
教师对产率的评价 | 偏低 | 偏高 | 偏高 | 偏低 |
下列各组同学对造成产率偏高或偏低的原因分析,正确的是__________(填编号).