答案为A，these指代endorphins；但是白勇语法全解中提到(p253）this/that/these不能单独充当主语，必须加上名词才能做主语。求助NN指点迷津(其他几个错误项的错误都明白，无需解释了)~
Besides adding complementary flavors to many foods, hot sauces stimulate the release of endorphins in the brain, just as exercise does, and these have a pain-relieving effect like morphine's.
(A) hot sauces stimulate the release of endorphins in the brain, just as exercise does, and these have a pain-relieving effect like morphine's
(B) hot sauces stimulate the release of endorphins in the brain, like exercise, and they have a pain-relieving effect that is like morphine
(C) hot sauces and exercise both stimulate the release of endorphins in the brain, and they have a pain-relieving effect like morphine
(D) the release of endorphins in the brain is stimulated both by hot sauces and exercise, and they have a pain-relieving effect like morphine's
(E) the release of endorphins in the brain is stimulated by hot sauces, just as with exercise, and these have a pain-relieving effect like that of morphine | 
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
发表于 2010-9-23 10:48:51
收藏
收藏
楼主
发表于 2011-4-12 22:16:55
