▲同意付老师的分析。这里的不定式是表语，不是状语。

What looks to be a tasty bean dip 相当于 the thing looks to be a tasty bean dip 或是 something looks to be a tasty bean dip。

▲类似地，下面句子中what look后面的介词短语或形容词也是表语：

He noticed what looked like a bundle of rags beside the road. 他注意到路边有一堆看上去像抹布似的东西。

What looks obvious in hindsight was not at all obvious at the time. 事后一目了然的事在当时根本看不清。

The ship is pitching and rolling in what looks like about fifteen foot seas. 这只船在看起来约有15英尺高的海浪中上下左右颠簸。

His eyes slowly began to focus on what looked like a small dark ball. 他的眼睛慢慢开始看清楚那个看上去像是个小黑球的东西。