【名词&注释】
叶绿体(chloroplast)、太阳黑子(sunspot)、直接影响(directly affect)、全球气候变化(global climate change)、线速度(linear velocity)
                            
                                                                                         
                                                                    
                                                                     [填空题]气候变化与异常直接影响人类的生产和生活。引起全球气候变化与异常的原因不可能是
                                                                                                
                              
                                    
                                        查看答案&解析查看所有试题
                                        
                                                                    
                                                                    学习资料:
                                                                    
                                                                         
                                    
                                     [单选题]
                                                                                                            
                                            A. right now  
  B. from now 
  C. at times 
  D. in time 
 
                                                                    
                                    
                                     [单选题]41_______
                                                                                                            
                                            A. knew 
  B. saw 
  C. showed 
  D. made 
 
                                                                    
                                    
                                     [单选题]31_______
                                                                                                            
                                            A. Though 
  B. For 
  C. Therefor 
  D. But 
 
                                                                    
                                    
                                     [单选题]How did the accident happen?
                                                                                                            
                                            A. A lorry hit a car. 
  B. A car ran into a lorry. 
  C. A bank clerk rushed into the street. 
 
                                                                    
                                    
                                     [单选题]禾柄锈菌的冬孢子为双胞双核,夏孢子为单胞单核。( )
                                                                                                            
                                            A. 正确 
  B. 错误 
 
                                                                    
                                    
                                     [单选题]凡是叶的表皮细胞都无叶绿体。( )
                                                                                                            
                                            A. 正确 
  B. 错误 
 
                                                            
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