[讨论]大全Sec12-10

10.        A migraine typically afflicts one side of the head, lasts for hours or days, and may recur as infrequently as once every other month or often, as daily.

(A) as infrequently as once every other month or often, as

(B) as infrequently as once every other month or as often as

(C) infrequently, as often as once every other month, or often, like

(D) infrequently, like once every other month, or often, like（B）

(E) infrequently, like once every other month, or as often as

答案是b，为什么d不对呢？个人觉得b和d是两种不同的表达方式，请大牛指点，多谢！

like为介词，想必没有问题吧，介词短语修饰　adv？这里用like结构，给我感觉更象修饰前面主句的主语A migraine

OG比较喜欢SUCH AS, 不喜欢LIKE当表示例如时, 大家觉得如果D改为

A migraine typically afflicts one side of the head, lasts for hours or days, and may recur infrequently, such as once every other month or often, such as daily. 对不对啊.

当然感觉还是没有B好, 如果没有B, 上面这个对不对啊?