We can dress the seeds with pesticides before sowing.

2. What do you know about chemical pesticides?

We can dress the seeds with pesticides before sowing. A: 正确 B: 错误

Pesticides must be burned at very high temperature because high temperatures can limit ______.

Effects of long term use of pesticides include ( ) A: imbalances in ecosystems B: develop new dominant pest species C: lose keystone species. D: Beneficial organisms and even natural enemies of the pests may be among the species eliminated by pesticides

Organic food is a kind of food produced without _________ chemicals or pesticides. A: hand-made B: fake C: artificial D: unreal

Organic food is unadulterated food produced without ________ chemicals or pesticides. A: artificial B: hand-made C: craft D: strong

The major problem is the need for large quantities of water and ______ to grow the crops. A: food B: fertilizers C: pesticides D: chemicals

For the study, two types of rice were genetically altered to resist two common insect ___________, which usually require heavy use of pesticides to control. A: pests B: traits C: conventional D: skeptics

Which of the following would increase the supply of corn? A: a decrease in the price of wheat B: an increase in the price of pesticides C: a severe drought in the corn belt D: a decrease in the demand for corn E: a fall in the price of corn