关于领导一成员交换理论的陈述，正确的是（）。

What can we say about the discovery of Mangrove Rivulus？

A. It was made quite by accident

B. It was based on a lab test of sea life

C. It was supported by an American magazine

D. It was helped by Patricia Wright

What can we say about the new global satellite communications systems？

A．They are widely used.

B．They are very helpful.

C．They are costly.

D．Both A and B.

What can we say about teenaged smokers？

A．The picture about the teenage smokers is similar to that of women smokers.

B．The situation among teenagers is quite the same with men.

C．High school students are more likely to smoke than college students.

D．Farmers' children tend to smoke more.

A、in addition to

B、that is to say

C、be different from

D、about

What can we say about teenaged smokers ？

A. The picture about the teenage smokers is similar to that of women smokers.

B. The situation among teenagers is quite the same with men.

C. High school students are more likely to smoke than college students.

D. Farmers’ children tend to smoke more.

What can we say about teenaged smokers？

A．The picture about the teenage smokers is similar to that of women smokers.

B．The situation among teenagers is quite the same with men.

C．High school students are more likely to smoke than college students.

D．Farmers' children tend to smoke more.