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问题 单项选择题

机翼的主要功用，不包括（）。

A.产生升力

B.横向稳定作用

C.横向操纵作用

D.纵向操纵作用

答案

参考答案：C

补全对话，情景问答
读一读，给问句选择合适的答语。
( )1. Can I wear my T-shirt?              
( )2. What's the weather like today?      
( )3. What are you  doing?                
( )4. How much is  the dress?            
( )5. Are they  donkeys?                  
( )6. Can I help you?                    
( )7. How much are they?                  
( )8. What time is it?                    		A. I'm reading a book.                      
B. Thirty-five  yuan.                      
C. Yes, please.  I want a pair of  sneakers.
D. Yes,  you can.                          
E. It's cloudy today.                      
F. No, they aren't.                        
G. It's six o'clock.                        
H. They're fifteen yuan.                    
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单项选择题

吉非替尼治疗复发晚期非小细胞肺癌的症状改善率为（）。

A.20%

B.30%

C.40%

D.50%

E.60%
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