请教og11-90，关于act like的问题（新问题）

请教

og56中有说，act like是指人。

但是og90中又把act like拿来指物。

所以，请教，是og的bug，还是我没理解对？

56。 In a plan to stop the erosion of East Coast beaches, the Army Corps of Engineers proposed building parallel to shore a breakwater of rocks that would rise six feet above the waterline and act as a buffer,
                so that it absorbs the energy of crashing waves and protecting the beaches.

a.      act as a buffer, so that it absorbs

b.      act like a buffer so as to absorb

c.      act as a buffer, absorbing

d.      acting as a buffer, absorbing

e.      acting like a buffer, absorb

Parallelism + Idiom

The last part of the sentence describes the breakwater and should consist of two grammatically parallel phrases, absorbing ... and protecting, in order to show two equal functions. Act is followed by like to mean to behave or comport oneself and describes the action of a person: He acted like a fool. Here, act as describes the function of a thing; the breakwater ... acts as a buffer. As an inanimate object, a breakwater cannot "behave" itself; it must be performing some function.

90. The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over them; the resulting flow pattern, with crests and troughs that remain
                stationary although the air that forms them is moving
                rapidly, are known as ^"standing waves."

(A)         crests and troughs that remain stationary although the air that forms them is moving rapidly, are

(B)         crests and troughs that remain stationary although they are formed by rapidly moving air, are

(C)        crests and troughs that remain stationary although the air that forms them is moving rapidly, is

(D)        stationary crests and troughs although the air

that forms them is moving rapidly, are

(E)         stationary crests and troughs although they are formed by rapidly moving air, is

OG没有bug，只有理解错误。

as和like的区别在于他们本身含义的区别，一个是“作为”，一个是“像”。

与指人还是指物无关。只要能发出act这个动作就行。

Act is followed by like to mean to behave or comport oneself and describes the action of a person: He acted like a fool.

这句话在OG中只是在解释ack like的意思，并不是在说明它的用法。