求助语法2道谢谢解答

52074653UID: 2118284

The Mycenaen people entered ancient Greece and established the Helladic culture, that can be divided into three periods.  
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& H/ l- ]7 |: u7 ^  O# N0 [! ^题目给的答案是D， 为什么？谢谢，记得SAT里面逗号后面也能用that 代替which..不像是在我们中学里面学的只能用which,。。是我弄错了？ 大家看看，谢谢




+ R8 Y% p3 r8 ^2 S2 g! O& Z( l( MThe white dwarf, a type of star who is unusually faint, has a mass equivalent to that of the Sun even though the white dwarf is approximately the same size as Earth.

+ i! U( H- }* I& L$ i题目答案是A，当然应该把 who改成which, 但是D答案为什么不用写成 that of Earth,表示SIZE， 因为前面比较质量的时候都写了  that of the Sun ，谢谢解答

52074653UID: 2118284

顶一下。

amyceresUID: 2206721

that不可以代替which

the white dwarf is approximately the same size as Earth
. r$ `3 y& H8 H$ D( G/ }. c* G这里主语是WD不是the size of WD

water0915UID: 2222422

has a mass equivalent to that of the Sun

mass compare to mass of sun
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BTW: how to distinguish the use of that and which? which is used for non-essential parts?

杀生玲UID: 2204304

同意三楼。。。