The 2009 H1N1 influenza outbreak put the entire world on alert. In 2003, SARS crossed the world,26 i
【Reading Comprehension】Radiocarbon dating and tree-dating, in combination, have provided a very powe
【題組】32.The word “stems” in paragraph 1 is closest in meaning to _____ .(A) distinguishes (B) recover
【題組】33.The approximate age of a tree can be determined by _____ .(A) counting the rings (B) analyzin
【題組】34.The word “onset” in paragraph 2 is closest in meaning to _____ .(A) darkness (B) coldness (C)
【題組】35.The word “enables” in paragraph 2 is closest in meaning to _____ .(A) combines (B) forces (C)
【題組】37.According to the passage, the production of rings from year to year in any given tree is ____
【題組】38.The word “reflect” in paragraph 3 is closest in meaning to _____ .(A) limit (B) affect (C) co
【題組】39.A narrow growth ring between two wide growth ring would probably indicate _____ .(A) an unusu