see the example:

OG11-VERBAL-100

Proponents of artificial intelligence say they will be able to make computers that can understand English and other human languages,recognize objects,and reason as an expert does---computers that will be used to diagnose equipment breakdowns,deciding whether to authorize a loan, or other purpose such as these.

答案C. like an expert---computers that will be used for such purposes as diagnosing equipment breakdowns or deciding whether to authorize a laon没疑问，只有这个选项最合理。但是竟然可以用like an expert

答案分析说这里用as expert does和like an expert都可以！！记得大学说的，like的话是代表不真实的，但是这里用as应该好点。可是答案是like 。。。什么时候可以互用？什么时候不可以呢？

谢谢