Your body, which has close relations with the food you eat, is the most important thing you own, so it needs proper treatment and proper nourishment(营养). The old saying An apple a day keeps th    
                        
                     
                                
                                           
                        
                        
                            室内垃圾桶平时桶盖关闭不使垃圾散发异味,使用时用脚踩踏板,桶盖开启。根据室内垃圾桶的结构示意图可确定:A.桶中只有一个杠杆在起作用,且为    
                        
                     
                                
                                           
                        
                        
                            (本小题满分12分) 已知函数 (Ⅰ)判断的奇偶性; (Ⅱ)判断在内单调性并用定义证明; (Ⅲ)求在区间上的最小值.    
                        
                     
                                
                                           
                                
                                           
                        
                        
                            具有相同数目氧原子的SO2和SO3,下列关系中一定正确的是 A.n(SO2): n(SO3)  =  2:3  B.V(SO2): V(SO3) = 3:2   C..m(SO2): m(SO3) =  6:5  D.Mr(SO2) : Mr(SO3) = 5:4    
                        
                     
                                
                                           
                        
                        
                            函数的最小正周期为(  ) A.4π  B.2π  C.π   D.    
                        
                     
                                
                                           
                        
                        
                            如图,在由若干个同样的小平行四边形组成的大平行四边形内有一个★,则含有★的平行四边形有  个.(用数字作答)    
                        
                     
                                
                                           
                        
                        
                            The nutrients in _____falls into the ocean quickly become available to other living creatures.        A. whatever           B. whichever         C. that