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[单项选择]PCM编解码则是用()技术实现的多少决定的。
A. 乘法器
B. A/D和D/A
C. 积分器
D. 微分器

热门试题:

[单项选择]监理组织机构中,拥有职能部门的监理组织形式有( )。
A. 直线制和职能制
B. 职能制和矩阵制
C. 直线制和直线职能制
D. 矩阵制和直线制
[判断题]各分支行执行总行的行政公章管理办法,可不制定本机构行政公章实施细则。( )
A.正确
B.错误
[单选题]每一成人旅客可免费携带一名身高不足( )米的儿童。
A.1.2
B.1.1
C.1
D.1.25
[单选题]1.(单选题)起重机司机使用的音响信号中,二短声表示:()
A.明白
B.重复
C.注意
[单选题]遮断、遮断预告、复示信号机以()为定位。
A. 无显示
B. 进行信号
C. 停车信号
[多选题]设备使用单位每半年对( )做一次检测。
A.检查锤
B.安全带
C.安全绳
D.安全桩
[单选题]以下哪个调制度属于可接受范围:
A.0.7
B.0.8
C.0.93
D.0.99
[单选题]作业现场的生产条件和安全设施等应符合有关标准、规范的要求,工作人员的()应合格、齐备。
A.劳动防护用品
B.安全工器具
C.施工机具
D.装备
[单选题]客户侧双许可是在客户侧营销现场作业时,由供电方许可人和客户方许可人共同对()进行许可的工作制度。
A.A.工作票
B.B.现场作业工作卡
C.C.工作票或现场作业工作卡
D.D.用电检查通知单
[单选题]
新建、改建、扩建的发、输、变电工程投入运行前,调度机构应适时编制(____)和有关技术要求,并协调组织实施。
A. 新设备调试方案
B. 新设备启动并网调度方案
C. 新设备验收大纲
D. 新设备运行规定
[单选题]如果按技术性能的优劣来排序,则以下排列正确的是( )。
A.双变换在线式UPS>串并联调整式UPS>在线互动式UPS
B.在线互动式UPS>双变换在线式UPS>串并联调整式UPS
C.串并联调整式UPS>在线互动式UPS>双变换在线式UPS
D.备式正弦波UPS >双变换在线式UPS>串并联调整式UPS
[单选题]参与公司系统所承担电气工作的外单位或外来工作人员应熟悉本规程,经考试合格,并经( )认可,方可参加工作。
A.相关单位分管领导
B. 设备运维管理单位
C.安全监督管理部门
D.调度控制中心
[不定项选择题]A.四环素
A.阿奇霉素
B.0.3%氧氟沙星
C.万古霉素
D.更昔洛韦
E.单纯疱疹性眼病可选用( )
[单选题]从事对眼睛有伤害的打磨、吹扫、射钉等作业的人员,必须( )。
A..系安全带
B..戴防尘口罩
C..带护目镜
[单选题] 设备的地脚螺栓有( )。
A.2个
B.3个
C.4个
D.5个
[单项选择]某病畜的卫生处理措施如下:病畜不准解体,2m深坑加石灰掩埋,肉绝对禁止食用。此病畜可能感染了哪种人畜共患传染病
A. 结核
B. 炭疽
C. 猪瘟
D. 口蹄疫
E. 布氏杆菌病
[判断题]CK-MB通常在发生急性心肌梗死后4~6h内开始升高,达高峰时间为18~24h,持续3~4天。
[判断题]公交维修工服务规范要求,文明生产.文明维修,不野蛮作业。
A.正确
B.错误
[单项选择]As it is used in the passage, the word "photosphere" (Line 3, Para. 2) means______.


A. a scarlet gaseous envelope surrounding the Sun
B. the luminous envelope of gas surrounding the Sun
C. the mixture of gasses that surrounds any planet or star
D. the luminous irregular envelope of highly ionized gas outside the chromospheres of the Sun
[填空题]开热油泵前必须()。
[多选题]低压电气工作时,拆开的()、断开的()应采取绝缘包裹等遮蔽措施。
A.引线
B.线头
C.相线
D.零线
[填空题]新版药品管理法提倡坚持()管理,将( )理念贯穿于药品研制、生产、经 营、使用、上市后管理等各个环节
[单项选择]患者女,65岁,近记忆力下降10年,言行不一致7年,生活不能自理3年,无自发语言1年。颅脑MRI:双侧海马萎缩,弥漫性皮质萎缩,脑室扩大。关于该病的细胞内包涵体的检测,可以选用针对某种蛋白的抗体进行免疫组织化学染色,这种蛋白是()
A. Tau蛋白
B. 神经丝蛋白(NF.
C. 突出核蛋白(Synuclein)
D. 朊蛋白(Prion)
E. 胶质纤维酸性蛋白(GFAP)
[单选题]S波段一次监视雷达的测距精度不应大于()。
A.150米
B.200米
C.120米
D.110米
[单项选择]()“以诗为词”,开拓了词的题材、意境、风格与表现手法。
A. 苏轼
B. 辛弃疾
C. 欧阳修
D. 柳永
[简答题]结合小学教学实际,谈谈如何进行提高学生问题解决能力的教学。
[单选题]并联型直流电源中,当交流电源正常运行时,交流电源通过什么转换为直流电源带正常负载?
A.逆变
B.AC/DC
C.升压
[多项选择]客户服务审计包括()阶段。
A. 外部客户服务审计
B. 内部客户服务审计
C. 识别潜在的改进方法和机会
D. 确定客户服务水平
E. 客户绩效衡量
[单选题]VHF通信系统的频率范围为( )
A.118.00MHz~136.975MHz;
B.118.00KHz~136.975Kz;
C.118.00Hz~136.975Hz。
[判断题] 发展党员工作坚持入党自愿原则和个别吸收原则,成熟一个,发展一个。
A.正确
B.错误
[单选题]使用列尾装置的列车,遇加挂车辆因软管等原因不能编挂在列车前部或中部,该车辆又不能挂列尾装置时,准将其挂于安装列尾主机车辆的后部(不含南山口至拉萨区段、拉萨西至日喀则西区段),以()为限,挂车时须有调度命令。
A.一辆
B.两辆
C.三辆
D.四辆
[单项选择]可作填充剂、崩解剂、黏合剂的是().
A. 糊精
B. 淀粉
C. 羧甲基淀粉钠
D. 硬脂酸镁
E. 微晶纤维素
[单选题]请阅读短文,完成此题。 Back in the old days, when I was a child, we sat around the family round table at dinnertime and exchanged our daily experiences. It wasn't very organized, but everyone was recognized and all the news that had to be told was told by each family member. We listened to each other and the interest was not put-on; it was real. Our family was a unit and we supported each other, and nurtured each other, and liked each other, and--we were even willing to admit--we loved each other. Today, the family round table has moved to the local fast-food restaurant and talk is not easy, much less encouraged. Grandma, who used to live upstairs, is now the voice on long distance, and the working parents far too beaten down each day to spend evening relaxation time listening to the sandbox experience of an eager four-year-old. So family conversation is as extinct as my old toys and parental questions such as "What have you been doing, Bobby?" have been replaced by "I'm busy, go watch television. "And watch TV they do; count them by the millions. But it's usually not children's television that children watch. Saturday morning, the children's hour, amounts to only about 8 percent of their weekly viewing. Where are they to be found? Watching adult television, of course, from the Match Game in the morning, to the afternoon at General Hospital, from the muggings and battles on the evening news right through the family hour and past into Star sky and Hutch. That's where you find our kids, over five million of them, at 10 p.m., not fewer than a million until after midnight! All of this is done with parental permission. Television, used well, can provide enriching experiences for our young people, but we must use it with some sense. When the carpet is clean, we turn off the vacuum cleaner. When the dishes are clean, the dishwasher turns itself off. Not so the television, which is on from the sun in the morning to the moon at night and beyond! Parents must exercise some control and show some concern about the cultural influence on the child when a program not intended for that child is viewed. Parents need to intervene. Nonintervention may be a wise policy in international affairs, but the results of parental nonintervention will not be wise at all. From the first two paragraphs one may infer that the writer's attitude towards "the old days" is__________. 查看材料
A.preferring
B.hating
C.being tired of
D.disappointing
[单选题] "396、吸收法广泛用来控制气态污染物的排放,它基于各组分的()。
A.沸点不同
B.挥发度不同
C.溶解度不同"

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