更多“由555定时器构成的自激多谐振荡器如图所示,3脚输出的脉冲信”相关的问题
申请人使用银行汇票，应向出票银行填写“银行汇票申请书”，填明收款人名称、汇票金额、申请人名称、申请日期等事项并签章，签章为其（）。
A.预留银行的签章 B.单位公章 C.财务专用章 D.法定代表人签章
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若一种铸造合金的液相线温度为920℃，则宜选用下列哪种包埋材料
A.磷酸盐包埋材料
B.铸钛包埋材料
C.正硅酸乙酯包埋材料
D.石膏包埋材料
E.硅溶胶包埋材料
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某工程因业主资金原因停工3月，则监理单位的善后工作和恢复监理业务的工作应属于监理的（）。
A . 正常工作
B . 附加工作
C . 额外工作
D . 新监理合同
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可以通过修改控件数组中控件的（）值改变其在数组中的顺序。
A.Font B.Caption C.Name D.Index
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涵洞设计位置坡度接近临界坡时，涵洞坡度应按临界坡设计。
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供电服务投诉是指公司经营区域内（含控股、代管营业区）的电力客户，在（）、电网建设等方面，对由于供电企业责任导致其权益受损表达不满，要求维护其权益而提出的诉求业务。
A.供电服务
B.营业业务
C.停送电
D.供电质量
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胸腺的主要功能是产生（ ）
A.单核细胞 B.T淋巴细胞 C.B淋巴细胞 D.巨噬细胞 E.中性粒细胞
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新民主主义革命的文化纲领是什么?
A. 无产阶级领导的 B. 民族的文化 C. 科学的文化 D. 大众的文化 E. 以上都是
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单选(2分) 马克思主义中国化第一次历史性飞跃产生的理论成果是( )
A. 新民主主义革命总路线 B. 新民主主义革命纲领 C. 毛泽东思想 D. 过渡时期总路线
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下列物质中不含塑化剂的是（）
A.电缆
B.橡胶制品
C.易拉罐
D.塑料袋
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青皮升压作用的有效成分
A．N-甲基酪胺B．对羟福林C．黄酮苷D．柠檬酸E．以上均非
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目前我国计划免疫的正确含义是（）。
A.对儿童进行脊髓灰质炎、百日咳、白喉、破伤风、结核、麻疹等六种生物制品的接种 B.根据疫情监测和人群免疫状况分析，按照规定的免疫程序，有计划地利用生物制品进行人群预防接种，以提高人群免疫水平，达到控制以至最终消灭相应传染病的目的 C.对儿童的基础免疫和加强免疫 D.经常性的常规免疫加上流行时的应急免疫 E.以上均不是
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桥长在50m以下的桥梁墩台或桥梁位于干沟、封冻河上进行墩台定位测设时，都可以采用（）丈量法。
A . A、曲线
B . B、三角
C . C、直接
D . D、间接
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听力原文： A man once said how useless it was to put advertisements in the newspapers. 'Last week,' he said, 'My umbrella was stolen from a London church. As it was a present, I spent twice its worth in advertising, but didn't get it back.' 'How did you write your advertisement?' asked a businessman. The man took out of his pocket a slip cut from a newspaper. The other man took it and read, 'Lost from the City Church last Sunday evening, a black silk umbrella. The gentleman who finds it will receive ten shillings on leaving it at No. 10 Broad Street.' 'Now,' said the man, 'I often advertise, and find that it is always useful. But the way in which an advertisement is expressed is of great importance.' The businessman then took a slip of paper and wrote: 'If the man who was seen to take an umbrella from the City Church last Sunday evening does not wish to get into trouble, he will return the umbrella to No. 10 Broad Street. He is already known.' This appeared in the newspaper, and on the following morning, the man was astonished when he opened the door. In the door way lay at least twelve umbrellas of all size and colors that had been thrown in, and his own was among the number. Many of them had notes tied to them saying that they had been taken by mistake, and begging the loser not to say anything about the matter.(30)A．He didn't pay enough money.B．His umbrella was a present.C．The umbrella was very good.D．The advertisement was not well written.
A.'B.C.'D.'E.'F.(30)A．HeG.B．HisH.C．TheI.D．The
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