【求助】代词指代问题，prep1-42与prep1-91

42.   (26647-!-item-!-188;#058&002738)

As a result of a supernova explosion, every human being on Earth was bombarded on February 23, 1987, by about 100 billion neutrinos; fortunately, neutrinos are harmless elementary particles that are produced in nuclear reactions and that interact very weakly with matter.

(A) neutrinos are harmless elementary particles that are produced in nuclear reactions and that

(B) neutrinos, which are harmless, are elementary particles produced in nuclear reactions and which  主语和从句不能用and连接并列

(C) neutrinos are harmless elementary particles produced in nuclear reactions and which  主语和从句不能用and连接并列

(D) these harmless elementary particles are produced in nuclear reactions, and neutrinos 分成两个句子，逻辑意思错了

(E) these elementary particles, harmless products of nuclear reactions同位语, are neutrinos that

Although they are more temperamental and far more expensive than transistor-driven amplifiers, many audiophiles and audio professionals prefer the warmer, richer tones produced by vacuum-tube-driven amplifiers. 

(A) many audiophiles and audio professionals prefer the warmer, richer tones produced by vacuum-tube-driven amplifiers

(B) many audiophiles and audio professionals think the warmer, richer tones produced by vacuum-tube-driven amplifiers make them preferable

(C) warmer, richer tones are produced by vacuum-tube-driven amplifiers and they are thus preferred by many audiophiles and audio professionals

(D) vacuum-tube-driven amplifiers are preferred because they produce warmer, richer tones by many audiophiles and audio professionals

(E) vacuum-tube-driven amplifiers are preferred by many audiophiles and audio professionals because these amplifiers produce warmer, richer tones

这题前面那个比较结构they are more...than  transistor-driven amplifiers,所以they必定是指代另一种amplifiers，这决定了后句的主语必须是另一种amplifiers，不然they就会产生歧义。D中，好好的amplifiers are preferred by A and B被because隔开了，不及E

所以我不认同你说these出现必错。另外，these amplifiers不叫裸奔，these做amplifiers的定语，“这个”amplifiers， these amplifiers = vacuum-tube-driven amplifiers
    

(A) More than 300 rivers drain into Siberia's Lake Baikal, which holds 20 percent of the world's fresh water, more than all the North American Great Lakes combined.同位语

(B) With 20 percent of the world's fresh water,
                                        that裸奔
                                is more than all the North American Great Lakes combined, Siberia's Lake Baikal has more than 300 rivers that drain into it.

(C) Siberia's Lake
                                        Baikal, with more than 300 rivers draining into it, it holds more of the world's fresh water than all that of the North American Great Lakes combined, 20 percent.

(D) While more than 300 rivers drain into it, Siberia's Lake Baikal holds 20 percent of the world's fresh water,
                                        which 会产生歧义（20% of … or …） is more than all the North American Great Lakes combined.

(E) More than all the North American Great Lakes combined, Siberia's Lake
                                        Baikal, with more than 300 rivers draining into it, holds 20 percent of the world's fresh water.  改变原意

(A) More than 300 rivers drain into Siberia's Lake Baikal, which holds 20 percent of the world's fresh water, more than all the North American Great Lakes combined.同位语

(B) With 20 percent of the world's fresh water,
                                that裸奔
                        is more than all the North American Great Lakes combined, Siberia's Lake Baikal has more than 300 rivers that drain into it.

(C) Siberia's Lake
                                Baikal, with more than 300 rivers draining into it, it holds more of the world's fresh water than all that of the North American Great Lakes combined, 20 percent.

(D) While more than 300 rivers drain into it, Siberia's Lake Baikal holds 20 percent of the world's fresh water,
                                which 会产生歧义（20% of … or …） is more than all the North American Great Lakes combined.

(E) More than all the North American Great Lakes combined, Siberia's Lake
                                Baikal, with more than 300 rivers draining into it, holds 20 percent of the world's fresh water.  改变原意