职称英语理工类AB级答疑精选(3)
问题内容:
Black holes lead stars to self-destruct (Black holes trigger stars self-destruction ) 3. According to the fourth paragraph, which of the following is NOT true? A No nuclear explosion would be triggered inside(在...里面) the star B The star would be destroyed(毁灭) completely(完全地) C. Much of the star’s matter(物质) thrown(扔) by the explosion (爆炸)would be beyond(超过) the black hole’s reach(范围) D. The black hole would completely(完全地) devour(吞没) the star A 是“没有触发恒星的核爆炸” 或者是“在恒星里没有核爆炸被触发” 应该也不是正确的啊?
老师回复:
你好!根据排除法,A是正确的。
问题内容:
Nerve signals may travel through nerve or muscle fibers at speeds as high as two hundred miles per hour.
A) rates
B) impacts
C) ratios
D) pulses
为什么选A而不选D;rate和pulse有何区别?
老师回复:
rate有速度的含义, 如:a steady rate/稳定的速度, 而pulse只有“脉冲, 脉搏”的词义, 如:The doctor felt her pulse on her wrist. 这位医生在她的手腕上号脉。
因此答案应该选择A。
问题内容:
Why Humans Walk On Two Legs这一讲中第四题答案是B还是D? 4. What was true of the hypothesis of the research? A) Our apelike ancestors were anatomically different but had the same gaits. B) Bipeds with natural selection had an advantage over quadruped. C) Our apelike ancestors could adapt to different climate changes due to genetic variation. D) Bipeds had an advantage over quadrupeds due to changes in the environment.
老师回复:
根据教材中对该题的注解来看(猿人祖先在解剖学上存在的差异在自然选择的过程中决定了遗传变异, 而环境的变化使两足行走的动物比四足行走的动物更有优势), D应该是答案。教材上提供的答案不正确。
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