練習(xí)：
1.The haze of pollution mentioned in the first paragraph is a cloud
A) of moisture over Calgary, Canada．
B) developing over Pacific Ocean．
C) of industrial pollutants．
D) of desert dust and hydrocarbons．
2.One of the Prices’S findings (Paragraph 2)about the particles of the air is that
A) they contain more pollutants than normal particles．
B) they move much faster in high altitudes than in low altitudes．
C) they are finer and lighter than normal particles．
D) their ability to reflect light is much than stronger．
3.What did Price not do during her research?
A) She rented a Beechcraft．
B) She used her sensing equipment aboard the Beechcrah．
C) She collected samples of pollutants on the Northwest coast for further tests．
D) She tested quantities of chemicals in the air．
4.According to the last paragraph，which of the following statements about the two research
teams is true?
A) The two research teams whose findings Price correlates hers with are based in Asia．
B) Price corrects some inaccurate data provided by the two teams operating in Asia．
C) Price is working with the two research teams in Japan．
D) The two teams in Asia volunteer to correlate their findings with Price’s．
5.Which of the statements is closest in meaning to the sentence“…，we expect that sources in
Europe will contribute less than Asian sources．”?
A) Pollution is expected to be less serious in Europe than in Asia．
B) Pollution is studied in more depth in Europe than in Asia．
C) Pollutants coming from Europe are not the main source of pollution in North America．
D)Pollutants coming from Europe are the main source of pollution in North America．
1.The haze of pollution mentioned in the first paragraph is a cloud
A) of moisture over Calgary, Canada．
B) developing over Pacific Ocean．
C) of industrial pollutants．
D) of desert dust and hydrocarbons．
2.One of the Prices’S findings (Paragraph 2)about the particles of the air is that
A) they contain more pollutants than normal particles．
B) they move much faster in high altitudes than in low altitudes．
C) they are finer and lighter than normal particles．
D) their ability to reflect light is much than stronger．
3.What did Price not do during her research?
A) She rented a Beechcraft．
B) She used her sensing equipment aboard the Beechcrah．
C) She collected samples of pollutants on the Northwest coast for further tests．
D) She tested quantities of chemicals in the air．
4.According to the last paragraph，which of the following statements about the two research
teams is true?
A) The two research teams whose findings Price correlates hers with are based in Asia．
B) Price corrects some inaccurate data provided by the two teams operating in Asia．
C) Price is working with the two research teams in Japan．
D) The two teams in Asia volunteer to correlate their findings with Price’s．
5.Which of the statements is closest in meaning to the sentence“…，we expect that sources in
Europe will contribute less than Asian sources．”?
A) Pollution is expected to be less serious in Europe than in Asia．
B) Pollution is studied in more depth in Europe than in Asia．
C) Pollutants coming from Europe are not the main source of pollution in North America．
D)Pollutants coming from Europe are the main source of pollution in North America．