Pesticide is a kind of()medicine for human.

A.deadly

B.healthy

C.dead

D.health

ST likely to experience a decrease in fecundity as a result of the spraying of a pesticide not directly toxic to plants？ ______

A．A flowering tree pollinated by only a few insect species.

B．A kind of insect-pollinated vine producing few flowers.

C．A wind-pollinated flowering tree that is short-lived.

D．A flowering shrub pollinated by a large number of insect species.

free of pesticides. But currently, there is no federal standard for pesticide free "organically grown" foods grown without synthetic pesticides or fertilizers. The result, says U.S. Senate Agriculture Committee Chairman Patrick Leahy, is that consumers "too often see confusing and unsubstantiated claims such as ' organically grown' and ' natural' ".

Currently, 22 states have some kind of certification program or at least requirements for third party certification. Look for the words "certified organically grown" or similar wording. In most cases, that means that no synthetic pesticides have been used in three years and that no synthetic fertilizers have been used in two or three years. Even if your State does not have its own program, you may have seen organically grown produce in the marketplace. If you want to know exactly what that means, ask the store' s manager or the produce buyer about how the store' s "organic" produce was grown.

Legislation to establish a natural standard for organically grown produce is making its way through Congress. The US. Department of Agriculture would be responsible for the certification program. The legislation also would establish standards for processed foods claiming organic ingredients. But in the meantime, if you want to be certain that the produce you eat is pesticide free, you have two options. You can buy your fruits and vegetables from someone you know or you can grow your own.

The passage implies that______.

A．there is really no organically grown produce yet

B．some foods are falsely labeled

C．some states are slow in making laws concerned

D．each state should stop certifying certain foods

A.危害

B.美味

C.风景

D.残留

The pesticide DDT can be effective against ______.

A．malaria

B．wildlife

C．animals

D．human nervous system

A.Y

B.N

C.NG

Farmers can save a considerable amount of pesticide by ______.

A．resorting to spot-spraying

B．consulting infrared scanning experts

C．transforming poisoned rain

D．detecting crop problems at an early date