消除( )搭配词语

1、用偏振镜比较简便,可消除大部分杂射光,但对直接反射光效果有限.降低聚焦?降低光通量是没错,但dv一般可以自动调节,专业一些的机器加些曝光补偿就可以了.
2、用遮光板遮挡住外部光源,与偏振镜结合效果最好.
3、在较大光圈前提下,将焦点落在室内,这样即便有投影,也能保证室内成像,有时效果更好.
4、通过由室内向外打光,“吃掉”投影光.这个较难掌握,有兴趣可以试试.

直接将2.5g海藻酸钠直接加到1000毫升水里,水浴加热搅拌溶解.高温水浴加热溶解的时候溶液里面会出现很多气泡,但是溶解完冷却放置一段时间后气泡就能自动除掉.

卤代烃发生消去反应的条件是碱的醇溶液,生成2-溴丁烯和溴化钠以及水,自己配平啊,（条件是）醇,加热
2,3-二溴丁烷+氢氧化钠（或氢氧化钾）——2-溴丁烯+溴化钠+水

改变水的流速,取消振动源.
改变流速的办法,开阀的大小,换个水龙头就好了.
改变固有频率,（这个比较麻烦）换管.

Clear the Air
Tim and Jack had a quarrel,and then they didn’t talk with each other for a week.In fact,they misunderstood with each other.Tim thought Jack told the teacher his homework was copied.So did jack.Before this,they were good friends.But once they quarreled again,and spoke the true of fact.Then they cleared their misunderstanding and became friends again.From their experience,I learn that make everything clear is the best way clear the air.

问题有点泛,估计你的问题是交流采样方面的,一般采用同步采样和加窗技术