A. with Mars the risks involved are much greater than any previous space ventures
B. in the case of Mars, the rewards of scientific exploration can be very high
C. in the case of Mars, much more research funds are needed than ever before
D. with Mars, scientists argue, the fundamental interests of science are at issue
此题为难句题。有些难句是由语法结构造成的,有些难句是由思想抽象造成的,而此难句却是由修辞造成的。stakes一词的意思是赌注,奖金,在此比喻人们在此项目上投入很大,期望值也很高。当然机会与风险并存,如果成功回报很大,如果失败损失也很大。从Passage Four文章全文来看,stakes的意思应该是奖金、回报。文章讲,过去的探险都受商业和政治利益的驱使,而现在对火星的探索纯粹是一个科学的行为。然后它又讲,火星探索能够解决许多科学上的难题,给科学研究带来好处。因此应该选择B. in the case of Mars, the rewards of scientific exploration can be very high。
40. The passage tells us that proof of life on Mars would ____ .
A. make clear the complex chemistry in the development of life
B. confirm the suggestion that bacterial fossils traveled to Earth on the meteorite
C. reveal the kind of conditions under which life originates
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