17.(14分)化合物H是一种药物中间体，合成路线如下。A HCHO,HCI CICH.COO多步反应HC)HOB0C.H.BrO,OHOH已知：+HCHO HCH2OH1)C中所含官能团的名称为②钱(2)A→B过程中...

7.类比和推理是化学研究的重要方法。下列类比或推理正确的是A铁单质在潮湿的空气中容易生锈，则铝在潮湿的空气中也易生锈B.A山O,是两性氧化物，则Fe,0,也是两性...

8.(7分)学完《动物的类群》后，小明参加了七年级组织的“呼吸知识我学握”综合实践活动并交流了活动成果。活动一：设计呼吸知识展板图1图2图3(1)图1为蚯蚓，它生活...

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9.①语言、动作描写：与孙司令的对话刻画出三娃憨直纯朴的关中娃娃的形象；“军旗旗杆的钢质尖头…背脊处穿出”“双手死扣着”等动作生动地描写了三娃视死如归的胆气和...

21.(本题9分)()填空并观察下列各式的规律(a-b)(a+b)=(a-b)(a+ab+b）=a-b':(a-b)(a'+a'b+ab'+b)=a'-b';(a-b)(a'+a'b+a'b+ab'+b')=a-b;可得到(a-b)(a4+amb+…+ab+b4...

2/310.若面向量ā=(n,2),6=(1,m-),其中m,m∈R，则下列说法正确的是（)A.若2a+6=(2,6),则ā/6B。若石=-25，则与6同向的举位向量为号号C.若n=1,且ā与石的夹角为锐角，...

Section BDirections:Fill in each blank with a proper word chosen from the box.Each word can be used onlyonce.Note that there is one word more than you...

23Mom,I want to learn skating.I think it is easy.VI完形填空1合asticSkating is not asas it seems and it needsLast week.food.I had ahing was 31_fantasti...