After the analysis of the relation between metaphor and semantics and the exploration of semantic filtering model in metaphor comprehension,we put forward the ways of avoiding the metaphor cognitive faults and enhancing the second language learning effect by means of the application of semantic filtering model.

This paper investigates into the effect that rhetorical methods have on the meaning of discourses,pointing out the phenomenon of semantic filtering,semantic similarity,semantic parallel-connection that appear under the effect of rhetorical methods,and analyses the mechanism that produces the phenomenon.

The research progeny about corrosion character and deterioration mechanism of mechanical property of the corroded steel bars in concrete are mainly summarized and discussed in this article,which also expounds the deteriorating regularity of nominal strength and ductility of the corroded steel bars .

The necessity of marking minimum thickness and nominal thickness is analyzed.

thickness of the formed head shall not be less than the value derived from that head nominal thickness deduct plate thickness minus deviation C1.