在交流线路中，电压与电流都是随时间作正弦变化。（）

Traditional Chinese doctors believe we need a balance of yin and yang to_46__.For example, are you often weak and tired? Maybe you have 47__yin.You should eat hot yang foods, like beef. Eating Dangshen and Huangqi herbs_48__also good_49__this.But people who are too_50___ and angry may have too much yang. Chinese doctors believe that they should eat__51__yin foods like tofu. Chinese medicine is now popular in many__52__.It’s easy_53__a healthy lifestyle ,and it’s _54_ to eat a balanced diet.
As for me, I exercise every day, usually when I come home from school. My_55__ habits are pretty good ,I try to eat a lot of vegetables. I eat fruit and drink milk every day.I never drink _56_.Of course, I love junk food too ,but I try to eat it only _57__.Oh, and I sleep __58__.So you see ,I look after my health .And my healthy lifestyle_59_. Good food and__60__help me to study better.

小题1:	A．be health B．be healthy C．in healthy D．in health

小题2:	A．too many B．too much C．many too D．much too

小题3:	A．be B．is C．am D．are

小题4:	A．for B．at C．with D．in

小题5:	A．quiet B．outgoing C．active D．stressed out

小题6:	A．little B．much C．more D．less

小题7:	A．places B．cities C．western countries D．towns

小题8:	A．have B．to have C．having D．has

小题9:	A．difficult B．important C．easy D．interesting

小题10:

A．eating B．to eat C．eat D．eating

小题11:

A．orange juice B．coffee C．apple juice D．hot water

小题12:

A．one time a week B．once a week C．one time for a week D．once for a week

小题13:

A．nine hour every night B．nine hours every night C．nine hours every nights D．nine hour every night

小题14:

A．help me get good grades B．helps me get good grades C．help me to get good grades D．helps me getting good grades

小题15:

A．exercise B．exercises C．exercising D．to exercise