35. A natural number that cannot be formed by multiplying two smaller natural numbers _____ known as a prime number.
(A) is
(B) which is
(C) being
(D) those are

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統計： A(155), B(61), C(20), D(13), E(0) #1835497

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#3022159
A natural number tha...
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#3312819

A natural number (that cannot be formed by multiplying two smaller natural numbers) _____ known as a prime number. \

主詞為 A natural number (單數)故選is

不可選which is，因為加上which就變成關代，整句就沒有動詞了!

 

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