现在，很多保健品的广告做得很好，但消费者并不知道自己有没有必要吃这些东西。其实很多保健品在研发时并未做过________调查，并不知道哪种营养素是大家普遍缺乏的，服用未经这样的调查就开发出的保健品，对消费者来说完全是一种________。 依次填入划横线部分最恰当的一项是（ ）。

A.自始至终  影响

B.归根结底  妨碍

C.无庸讳言  干扰

D.理所当然  排斥

A. ⑤①②⑥③④

B. ⑥③②④⑤①

C. ②⑥③④⑤①

D. ⑥⑤①③②④

A. ③②⑥⑤④①

B. ⑥①⑤④③②

C. ④①③②⑥⑤

D. ③②④①⑥⑤

A.⑥③⑤②①④

B.④②⑥①③⑤

C.②①③⑤④⑥

D.①②⑥③⑤④

A. Medical Practice

B. Clever Advertising

C. Self-Medication

D. Self-Treatment

A. the reasons for keeping medicines at home

B. people's doubt about taking drugs

C. what kind of medicine people should prepare at home

D. the possible harms self-medication may do to people

A. those good things are not without side effects

B. why clever advertising is so powerful

C. why in modern times self-medication is still practised

D. why people develop faulty ways of life

A. they often watch ads on TV

B. they are more likely to buy the drugs advertised

C. they generally lead a sedentary life

D. they don't take to sports and easily catch colds

A. suggest that self-medication has a long history

B. define what diagnosis means exactly

C. praise doctors for their expertise

D. tell the symptoms from the causes

A. ensuring harmonious relationships

B. sharing responsibility with group members

C. identifying new leaders

D. achieving a goal