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【单选题】
特写聚焦法的正确操作步骤是
A.
减小焦距调整到构图所需要的景别→把聚焦开关拨到手动档→转动聚焦环使画面清晰→把焦距调整到最大
B.
把焦距调整到最大→转动聚焦环使画面清晰→减小焦距调整到构图所需要的景别→把聚焦开关拨到手动档
C.
把聚焦开关拨到手动档→把焦距调整到最大→转动聚焦环使画面清晰→减小焦距调整到构图所需要的景别
D.
转动聚焦环使画面清晰 → 把聚焦开关拨到手动档→把焦距调整到最大→减小焦距调整到构图所需要的景别
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【判断题】火灾误联动恢复操作时，门禁系统恢复在综合监控系统界面中，依次从'门禁系统'—'联动'中，进入之后点击'所有联动'，点击'灾后门禁恢复'，勾选内容框中的信息，点击'执行所选'
A.
正确
B.
错误
【单选题】A good modern newspaper is an extraordinary piece of reading. It is remarkable first for what it contains: the range of" news from local crime to international politics, from sport to business to fash...
A.
apply reading techniques skillfully
B.
jump from one newspaper to another
C.
appreciate the variety of a newspaper
D.
usually read a newspaper selectively
【单选题】绿色环保是化学实验的追求，下列操作不会引起空气污染的是
A.
用浓盐酸洗涤加热KMnO4制氧气的试管
B.
用稀硝酸洗涤做过银镜实验的试管
C.
硝酸亚铁和硫酸废液一同倒入废液缸
D.
将打破的水银温度计插入硫粉中
【多选题】有关铂皿使用操作正确的是（）
A.
铂皿必须保持清洁光亮，以免有害物质继续与铂作用；
B.
灼烧时，铂皿不能与其他金属接触；
C.
铂皿可以直接放置于马弗炉中灼烧；
D.
灼热的铂皿不能用不锈钢坩锅钳夹取。
【单选题】2 A good modern newspaper is an extraordinary piece of reading. It is remarkable first for what it contains: the range of news from local crime to international politics, from sport to business to fas...
A.
wide coverage
B.
uniform style
C.
speed in reporting news
D.
popularity