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单选题
According to this text, piloted space missions will need to be ______.
A
more exciting than earlier film versions.
B
supported by international organizations.
C
more cost-effective than they appear to be at present.
D
financed by individual governments.
参考答案
参考解析
解析：
推理判断题。A选项无中生有；由第三段第二句“In l998 no single government or international enterprise…”可知，1998年没有政府或国际企业愿意资助太空飞行，但并不能由此推断出载人太空飞行任务需要政府或企业的支持，故排除B和D。由最后一段最后一句“Clearly，key advances…lowering the cost of…”可知，降低人类离开地球的成本将会是取得的最大进步，也是人类去其他任何天体航行的第一步，故答案为C项。
推理判断题。A选项无中生有；由第三段第二句“In l998 no single government or international enterprise…”可知，1998年没有政府或国际企业愿意资助太空飞行，但并不能由此推断出载人太空飞行任务需要政府或企业的支持，故排除B和D。由最后一段最后一句“Clearly，key advances…lowering the cost of…”可知，降低人类离开地球的成本将会是取得的最大进步，也是人类去其他任何天体航行的第一步，故答案为C项。
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