Diseases of Agricultural Plants
1．题目：How many diseases are known to attack wheat?
答案：D）Around 40.
2．题目：According to this passage, which of the following would a plant disease result in if left unchecked?
答案：D）Social upheavals.
3．题目：What is the main idea of the second paragraph?
答案：A）Some plants have relative immunity to a great many diseases, while others have a susceptibility to them.
4．题目：According to the passage, some plant diseases can be prevented by
答案：B）inoculation.
5．题目：Which of the following statements is not true?
答案：D）Symptoms are always helpful in identifying diseases.
速记口诀：
农作物病虫害 1．40疾病已知道____________________
2．作物疾病引动荡____________________
3．疾病免疫是主旨____________________
4．接种可去阻止病____________________
5．症状用来定疾病____________________ [卫生类B]