那一种氨基酸，可用来形成甲状腺素（Thyroxine）及肾上腺素（Epinephrine）:
A. 甘氨酸
B. 苯丙氨酸
C. 色氨酸
D. 甲硫氨酸
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What does this passage mainly deal with
A. The tendency of earth's becoming hotter.
B. The assessment of earth's temperature.
C. The menace of global warming.
D. The measurement of tackling global warming.
What does the report from NRC indicate
A. The earth will become warmer.
B. It is somewhat suspicious of Michael Mann's assertion.
C. The earth reaches the highest temperature in the history.
D. The proxy measurements are reliable.
小陆桥运输从运输组织形式上看与大陆桥运输并无大的区别，只是其运送的货物目的地是（ ）。
A. 沿海港口
B. 内河港口
C. 内陆地区
D. 沿海或内河港口
Which statement is NOT true concerning the controversy about global warming
A. The new report from NRC is motivated by the controversy over Michael Mann's claim.
B. Those who doubt global warming consider that warming is a natural phenomenon.
C. Those suspicious of global warming take an inconsistent stance on the issue.
D. The argument ends in the defeat of global-warning-doubters.
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