OG12 71题 求教

davidliuscu

Unlike the original National Museum of Science and
Technology in Italy, where the models are encased in
glass or operated only by staff members, the Virtual
Leonardo Project, an online version of the museum,
encourages visitors to "touch" each exhibit, which
thereby activates the animated functions of the piece.

(A)    exhibit, which thereby activates
(B    exhibit, in turn an activation of
(C)    exhibit, and it will activate
(D)    exhibit and thereby activate
(E)    exhibit which, as a result, activates
A 和E 选项 og答案解释说which 没有先行词 exhibit不是么？逗号起了什么作用么？ 谢谢

davidliuscu

非常感谢！

steinlala

激活动画演示功能的是"touch"这个行为，而不是被触摸的exhibit本身，因此which代指exhibit在逻辑上是不合理的。
逗号作用很多，比如在本题E（你的F）中，插入语前后需要有逗号；在本题C中，and其连接句子功能时前面需要有逗号。