People who inherit the sickle cell anemia gene from only one parent seem to be resistant to malaria, an evolutionary advantage that may explain why a genetic condition so debilitating to many individuals has survived in the human population.
A) seem to be resistant to malaria, B) seemingly are resistant to malaria, C) seem to be resistant to malaria and have D) seemingly are resistant to malaria and to have E) are, it seems, resistant to malaria, and they have
People (who inherit the sickle cell anemia gene from only one parent )seem to be resistant to malaria, an evolutionary advantage that may explain why a genetic condition so debilitating to many individuals has survived in the human population. 后面这个an evolutionary advantage 是指前面整个主句的情况产生情况.
People who inherit the sickle cell anemia gene from only one parent seem to be resistant to malaria and have an evolutionary advantage that may explain why a genetic condition so debilitating to many individuals has survived in the human population.
have 不知道该和seem 还是be平行,如果是和seem,意思有问题,如果是和be,就应该是to have以示区别
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发表于 2003-12-7 03:38:00
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