职称英语考试

【单选题】The United StatesIn 1782 【51】 the United States won its independence, the bald eagle was chosen 【52】 the national bird of the new country.American leaders wanted the eagle to be a 【53】 of their country because it’’s a bird of strength and courage. They chose the bald eagle because it was found all over NorthAmerica and only in NorthAmeric
A、But a little over 200 years 【54】 ,the bald eagle had almost disappeared from the country, In 1972, there were only 3,000 bald eagles in the entire United States. The reason for the birds 【55】 population was pollution, especially pollution of rivers by pesticides. Pesticides are chemicals 【56】 to kill insects and other animals that attack and destroy crops.【57】 , rain often washes pesticides into rivers. Pesticides pollute the rivers and poison the fish.Eagles eat 【58】 and the poison 【59】 their eggs. The eggs have very thin shells and do not hatch. Eagles 【60】 only two or three eggs a year.Because many of the eggs did not 【61】 and produce more eagles, 【62】 eagles quickly 【63】 smaller.Today, theAmerican Government and theAmerican people are trying to protect the bald eagle. The number of bald eagles 【64】 It now appears 【65】 theAmerican national bird will survive and remain a symbol of strength and courage.
A、a number of
B．the number of
C．a number
D．the number

网考网参考答案：B
网考网解析：
the number of和a number of后都跟名词复数，但前者意为“…的数目”，中心词是number一词；后者意为“一些，若干”，修饰其后的名词，中心词是后面的名词。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>