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Which of the following faults would allow lube oil to enter the cooling system of a diesel engine?()
A.Excessive valve train lubrication
B.Leaking standby oil cooler core
C.Excessive lube oil pressure
D.Excessive lube oil in the system
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《甘肃省行政执法监督条例》自()开始实施。
A、2009年6月1日
B、2009年7月1日
C、2009年1月1日
D、2009年10月1日
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No come en casa porque tiene clases por la tarde.
A . 正确B . 错误
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在改革方面,依靠人民才有动力,为了人民才有意义。()
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简述艾滋病的临床关怀与国家免费抗病毒药物治疗的总目标。
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世界各国对茶的称谓起源于中国,“茶”字的音、形、义是中国最早确立的。
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可燃性气体、蒸气或粉尘与空气组成的混合物,能使火焰传播的最高浓度,称为该物质的()。
A . 爆炸极限B . 爆炸下限C . 爆炸上限D . 燃烧极限
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对外保函申请人如未对保函受益人履行某项义务时,由申请人承担保函中所规定的赔付责任。
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停止使用临时起搏器前,应首先将按需频率减慢,促使既保持患者固有心率,又能起到起搏功能,持续观察()小时。
A.12~24 B.4~8 C.24~48 D.48~72 E.1~2
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摘要:处方:碳酸氢钠50g注射用水适量全量1000ml依据《中国药典》二000年版二部及制剂规范要求提问:下列有关叙述中,哪些是正确的?()
A.制备碳酸氢钠注射液时,可加入适量的乙二胺四乙酸二钠作稳定剂 B.制备碳酸氢钠注射液时,溶液中应通入足量的二氧化碳气体防止分解 C.碳酸氢钠注射液的最佳PH值为6.5-8.0 D.配制碳酸氢钠注射液时,宜用新鲜的热注射用水 E.碳酸氢钠注射液分装后,可用115℃30分钟热压灭菌
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叶丝弹性指在一定温湿度条件下,单位质量的烟丝,通过()施压()后。再进行施压一定时间,释压高度与施压高度之差与施压高度的比率,以百分数表示。
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A . 汇编语言和机器语言是以指令为单位来编写程序B . 高级语言是以语句为单位来编写程序,一条语句相当于若干条指令(或者说一条语句可用若干条指令来实现)C . 面向对象语言或可视化构造语言是以对象(类)为单位来编写程序,一个对象相当于若干条语句((或者说一个对象可用若干条语句来实现)D . 上述有不正确的
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白喉棒状杆菌的毒力鉴定根据是()。
A . Elek平板试验
B . 吕氏培养基上快速生长的特点
C . 亚碲酸钾平板上菌落呈黑色或灰色
D . 白喉棒状杆菌的异染颗粒
E . 锡克试验
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巷道与硐室的施工目前主要以采用钻眼爆破法为主,该方法的主要施工程序是( )。
A. 工作面钻眼爆破
B. 通风与安全检查
C. 装渣与出渣
D. 临时支护及巷道永久支护
E. 排水管路安装
此题为多项选择题。
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听力原文: To extinguish different kinds of fires, several types of fire extinguishers have been invented. They must be ready for immediate use when fire breaks out. Most portable kinds operate for less than a minute, so they are useful only on small fires. The law requires ships, trains, buses and planes to carry extinguishers. Since fuel, oxygen and heat must be present in order for fire to exist, one or more of these things must be removed or reduced to extinguish a fire. If the heat is reduced by cooling the material below a certain temperature, the fire goes out. The cooling method is the most common way to put out a fire. Water is the best cooling material because it is low in cost and easy to get. Another method of extinguishing fire is by cutting off the oxygen. This is usually done by covering the fire with sand, steam or some other things. A blanket may be used to cover a small fire. A third method is called separation, which includes removing the fuel, or material easy to burn, from a fire, so that it can find no fuel. The method that is used to put out a fire depends upon the type of fire. Fires have been grouped in three classes. Fires in wood, paper, cloth and the like are called Class A fires. These materials usually help keep the fire on. Such fires can be stopped most readily by cooling with water.(30)A.Separating the fire.B.Reducing the heat.C.Removing the fuelD.Cutting off the oxygen.
A.B.C.D.E.(30)A.SeparatingF.B.ReducingG.C.RemovingH.Cutting
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