48. The passage implies that the warmest temperatures among the periods mentioned occurred (A) in the early eighteenth century (B) 160,000 years ago (C) at the end of each ice age (D) between 360 and 285 million years ago

45. According to the passage, scientists used isotopes from the water of the ice core to determine which of following? (A) The amount of air that had bubbled to the surface since the ice had formed (B) The temperature of the atmosphere when the ice was formed (C) The date at which water had become locked in the glacier (D) The rate at which water had been frozen in the glacier

48. The passage implies that the warmest temperatures among the periods mentioned occurred (A) in the early eighteenth century (B) 160,000 years ago (C) at the end of each ice age (D) between 360 and 285 million years ago

其他試題

48. The passage implies that the warmest temperatures among the periods mentioned occurred
(A) in the early eighteenth century
(B) 160,000 years ago
(C) at the end of each ice age
(D) between 360 and 285 million years ago