皮皮学，免费搜题
登录
搜题
【单选题】
上图为X线管灯丝加热电路,B11为稳压器,B4、B3分别为大、小焦点灯丝变压器;B10为空间电荷抵偿变压器;R3、R6为透视管电流调节电阻,R7、R8为摄影管电流调节电阻,XK1为摄影管电流选择器。下列电路分析,错误的是( )A.
透视时，JC2和JC4都不工作，则其工作电路为： B3→DZ7-F1→R7→R6→R3→JC2（常闭）→JC4（常闭）→B11（公） B3→DZ7-F0→DZ2-3→B11（出）
B.
点片摄影准备电路 XK1置于所需毫安档，拉动点片手柄，JC4工作，则其工作电路为： B11（出）→DZ2-3→DZ7-F0→B4→DZ7-F2→R8→XK1-300→B10→JC4（）→B11（公）
C.
小焦点摄影电路 XK1置于30mA档，按下手开关，透视与摄影交换接触器JC2工作，则其工作电路为： B11（出）→DZ2-3→DZ7-F0→B3→DZ7-F1→R7→XK1-300的30mA档→B10→JC2（）→B11（公）
D.
大焦点摄影电路 XK1置于50mA～200mA任一档，按下手开关，JC2工作，则其工作电路为： B11（出）→DZ2-3→DZ7-F0→B4→DZ7-F2→R8（50mA～200mA）→XK1-300→B10→JC2（）→B11（公）
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】A．Drive him to the concert. B．Cash his check. C．Sell him her tickets. D．Lend him some money.
【单选题】听力原文：M: Hi, Linda, are you going to teach after you graduate from that university? W: Where did you get the idea like that? Q: What can be concluded about Linda? (19)
A.
She may choose to teach.
B.
She has no desire to teach.
C.
She likes teaching very much.
D.
She has no idea about teaching.
【简答题】如何理解数据与信息之间的关系?(按照自己的理解来回答即可)
【单选题】Teach him to sell his strength and intelce to the person___offers the highst price.
A.
what
B.
that
C.
which
D.
whose
【单选题】Man: Hi, Linda, are you going to teach after you graduate from that university? Women: Where did you get the idea like that? Question: What can be concluded about Linda?
A.
She has no desire to teach.
B.
She likes teaching very much.
C.
She has no idea about teaching.
D.
She may choose to teach.
相关题目：