As there is less and less coal and oil, scientists are exploring new ways of making use of ________ energy, such as sunlight, wind and water for power and fuel. [ ]

A. primary  

B. alternative

C. instant  

D. unique

不属于急性重度有机磷农药中毒临床表现的是（）

A.全血胆碱酯酶活性一般在30％～50％

B.肺水肿

C.重度意识障碍

D.脑水肿

E.呼吸麻痹