根据OG241、141和prep1-129可见，beside 和as well as 都是要就近指代名词的，会产生逻辑主语的问题；而in addition to不会。
129.(31370-!-item-!-188;#058&004475)
In addition to her work on the Miocene hominid fossil record,Mary Leakey contributed to
archaeology through her discovery of the earliest direct evidence of hominid activity and through
her painstaking documentation of East African cave paintings.
(A)Mary Leakey contributed to archaeology through her discovery of the earliest direct evidence of
hominid activity and through her painstaking documentation of
(B)Mary Leakey contributed to archaeology by her discovery of the earliest direct evidence of
hominid activity and painstakingly documenting
(C)Mary Leakey was a contributor to archaeology by discovering the earliest direct evidence of
hominid activity and with her painstaking documentation of
(D)Mary Leakey's contributions to archaeology include her discovery of the earliest direct evidence
of hominid activity and painstakingly documenting
(E)Mary Leakey's contributions to archaeology include her discovering the earliest direct evidence
of hominid activity and painstaking documentation of
Key A
为什么呢？同是介词短语，有什么可以区分的规律吗？还是只能强记？
不知道可不可以这样理解:
Unlike, besides, as well as, other than 等是含有比较的意思的,所以比较的对象需要对等,即逻辑主语问题;
而in addition to, unless 表示除了, 是没有比较的意思的
欢迎讨论~
楼主aprilxlql说的问题主要源于下面两条，
1.In addition to her work on the Miocene hominid fossil record, Mary Leakey contributed to
archaeology through her discovery of the earliest direct evidence of hominid activity and through her painstaking documentation of East African cave paintings.
2.In addition to her work on the Miocene hominid fossil record, Mary Leakey's contributions to archaeology include her discovery of the earliest direct evidence of hominid activity and her painstaking documentation of East African cave paintings.
主干就是，
1.除了a1，M还through a2 and through a3
2.除了a1，A还包括a2和a3
我认为在句1、2两中in addition to的要求是a1，a2，a3一定性质相同(work,discovery,documentation)；
而在句2中，in addition to其实比较的也是her work和discovery and documentation，只是句2的优点是，它用了一个contribution,对应了前面的work，使句子又形成了一个对称，但是这是锦上添花的(effectiveness)，不是一定有要求的(correctiveness)，没有也不应该算错，我找了一些例句，
In addition to football, he likes basketball.
In addition to the zoo, we went to the museum.
In addition to French, he has to study Japanese.
In addition to his homework, he did many exercises.
In addition to an album, I gave him a pen and a pencil.
由于它的意思决定，in addition to一定是多用于宾语(上面的例子都是比较宾语的)；
而unlike，由它的意思决定，一定是多用于主语比较，如下，
Unlike the neutron, RNA has been known about for a long time.
Unlike an island, a peninsula is connected to land on one side.
Unlike federal laws, state laws only apply within a state's borders.
我找了两个比较宾语的，(我感觉这样比较挺别扭的)
It is a large, round, spiny fruit unlike any other.
Prep 2-34. (26262-!-item-!-188;#058&003094)
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.
最后强调一点，与unlike还有一点不同，in addition to可以接doing，这时候doing的逻辑主语，是就主句主语，如下，
OG-19
In addition to having more protein than wheat does, the protein in rice is higher quality than that in wheat, with more of the amino acids essential to the human diet.
(A) the protein in rice is higher quality than that in
(B) rice has protein of higher quality than that in
(C) the protein in rice is higher in quality than it is in
(D) rice protein is higher in quality than it is in
(E) rice has a protein higher in quality than
...beside为什么有是“比较”而不是“除了”？
似乎也没什么规律，就记吧。
prep +doing.都是主句主语是逻辑主语
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