27. The superheavy synthetic element Tennessine (Ts) is the most recently discovered element so far. The nuclear fusions reaction for producing Ts:

Berkelium (Bk) used in this reaction is also a synthetic element. What is the element X?
(A)
(B)
(C)
(D)
(E)

1. 題目解析題目中提到的合成元素T...