若|a|=3，|b|=3，且a，b的夹角为π6，则|a+b|为（ ） A．6 B．2

—Today our class has a heated discussion about whether we should watch TV． 
—      小题1:     .What’s the result?    
—      小题2:   
—Why?  
—Because Television keeps US informed of current events and offers an endless series of good
programmes．   
—It is reasonable，    小题3:    
—They think that it is a waste of time for the high school students to watch T V．   小题4:   
—Quite right．   小题5:   

A．The majority of us are against watching TV． B．What’s the opinion of the rest? C．It’s good for us to pass time by watching TV D．Every coin has two sides． E．Well，70％ of us think it is good for us to watch TV． F．What’s more，it’s bad for our health． G．A good topic．