p{font-size:10.5pt;line-height:150%;margin:0;padding:0;}td{font-size:10.5pt;}(08年厦门市适应性考试)为测定过氧化氢溶液的浓度,小明将一定量的过氧化氢溶液加入如图1    
                        
                     
                                
                                           
                        
                        
                            It was a rainy day and I was walking  down the street feeling comfortable and happy. I wanted to do something kind  for someone else without any reason and purpose, almost as if I was just trying  to     
                        
                     
                                
                                           
                        
                        
                            两物体A、B静止于同一水平面上,与水平面间的动摩擦因数分别为μA和μB,它们的质量分别为mA和mB,用平行于水平面的力F拉动物体A、B,所得加速度与    
                        
                     
                                
                                           
                        
                        
                            下列关于人类性别决定与伴性遗传的叙述,正确的是 A.性染色体上的基因都与性别决定有关 B.性染色体上的基因都伴随性染色体遗传 C.生殖细胞中    
                        
                     
                                
                                           
                        
                        
                            It’s really dangerous. One more step, ______ the baby will fall into the pool.      A.or          B.and             C.so            D.but    
                        
                     
                                
                                           
                        
                        
                            阅读下列对话,将空白处补全,所填单词数量不限。 Jack:Excuse me.Miss Green.I don’t feel well.       Miss Green:Oh, dear.    1    .What’s your trouble?     
                        
                     
                                
                                           
                        
                        
                            某蛋白质由m条肽链,n个氨基酸组成。该蛋白质至少有氧原子的个数是(    ) A. n-m B. n-2m          C. n+m           D. n+2m