第一个题目: Although fullenes was first found in the lab, they have since been found in nature, formed in fissures of the rare mineral shuengite. Since lab synthesis of fullenes requires distinctive conditions of temperature and pressure, this discovery should give geologists a test case for evaluating hypotheses about the state of the Earth's crust at the time these naturally occuring fullernes were formed. 问weaken: 正确答案是The naturally occuring fullerness are arranged in a previously unknown crystalline strucure. 第二个题目: Parasitic wasps lay their eggs directly into the eggs of various host insects in exactly the right numbers for any suitable size of host egg. If they laid too many eggs in a host egg, the developing wasp larvae would compete with each other to the death for nutrients and space. If too few eggs were laid, portions of the host egg would decay, killing the wasp larvae.
问conclusion 正确答案:The size of the smallest host egg that a wasp could theoretically parasitize can be determined from the wasp’s egg-laying behavior.
做测试就没找到一个认为合适的答案,测试完检查答案还是没有不觉得这个答案是正确的。求N人解释一下,为什么选这个答案?
[此贴子已经被作者于2007-12-21 18:54:28编辑过] |