海上有风浪，救助落水人员时，应先操纵船舶驶向（），从（）放下救生艇，救生艇应尽快从落

把下面的词语补充完整，并解释所填的字。

司空见(    )                        见微知(    )                      (    )而不(    )                             

无独有(    )                        追根求(    )                      百思不得其(    )               

大气污染对健康的间接危害不包括（）

A.臭氧层破坏

B.酸雨

C.温室效应

D.大气能见度降低

E.机体免疫力下降

Sequential circuit is a common logic device whose output values, at a given instant, depend upon its input values and the internal state at that instant, and whose internal state depends upon the (66) preceding input values and the preceding internal state. A sequential circuit can assume a finite number of internal states and may therefore be regarded, from an abstract (67) , as a finite (68) .

Combinational circuit is another logic device whose output values, at any given instant, depend upon the input values at that instant. A combinational circuit is a (69) of a sequential circuit whose internal state is not taken (70) .

（67）处填（）。

A．idea

B．observation

C．point of view

D．viewport

环境污染与破坏事故调查处理程序是（）。

A、现场处理

B、现场调查和报告

C、依法处理

D、结案归档

简述小半径曲线为什么要加强？