热门试题:
[判断题]《铁路机车运用管理规则》规定:新造内燃机车出厂时,除有电报指明上油数量外,加油量需满足回送要求,机车必须达到运用状态。
A.正确
B.错误
[单选题]卡尔费休法测定水含量时,终点的等待时间必须设置为()s
A..5
B..10
C..15
D..20
[判断题]各民族公民都有用本民族语言、文字进行行政诉讼的权利。( )
A.正确
B.错误
[单选题]做好高峰时段的列车出入段(场)作业,当接到行调通知或从ATS上确认有车回段(场)时,应及时联系(),确认接发车股道,排列进路接发列车。
A.派班调度
B.行车调度
C.车场调度
D.检修调度
[单选题]下述情况不宜使用胆碱酯酶抑制药的是
A.阵发性室上性心动过速
B.心动过缓
C.重症肌无力
D.肌松药过量解救
E.手术后腹气胀和尿潴留
[简答题]如图所示,已知R1=5Ω、R2=5Ω、R3=20Ω,求电路中a、b两端的等效电阻为______Ω。
[判断题] 棉、麻、草、苇、木材等物质密度低,质地疏松,在大风或火场热气流的作用下,燃烧碎片或燃烧纤维团被抛向空中,随风或热气流飘落到其他堆垛或可燃物上,会造成多处火点。( )
A.正确
B.错误
[单选题]引起慢性呼吸衰竭最常见的病因是()
A.成人呼吸窘迫综合征
B.支气管肺疾病
C.神经肌肉疾病
D.胸廓胸膜疾病
E.心血管疾病
[判断题]热继电器的双金属片弯曲的速度与电流大小有关,电流越大,速度越快,这种特性称正比时限特性。
A.正确
B.错误
[判断题]高压线路不停电时,工作负责人应向全体人员说明线路上有电,并加强监护。
A.正确
B.错误
[简答题]【问题2】
限制MailUser邮件主机里最多允许有2000个邮件用户,如何配置
[判断题] 特种设备特别重大事故由国务院或者国务院授权有关部门组织事故调查组进行调查。()
A.正确
B.错误
[单项选择]别构蛋白质常具有()
A. β-折叠
B. 氨基酸侧链基团
C. 亚基
D. 氨基酸排列顺序
E. 氢键
[单选题]( )在使用Edge浏览器时,哪个快捷键将当前页面添加至收藏夹:
A.Ctrl+T
B.Ctrl+H
C.Ctrl+D
D.Ctrl+B
E.Ctrl+T
[单项选择]小学生参加田径训练属于()
A. 基础训练阶段
B. 专项提高阶段
C. 最佳竞技阶段
D. 竞技保持阶段
[单项选择]
When sailors are allowed ashore after a long time at sea, they sometimes get drunk and cause trouble. For this reason, the navy (16) has its police in big ports. Whenever sailors cause trouble, the police come and (17) them.
One day, the police in a big seaport received a telephone call (18) a bar in the town. The barman said that a big sailor had got drunk and (19) the furniture in the bar. The officer in charge of the police guard that evening said that he would come immediately.
Now, officers who (20) and punish the sailors (21) drunk usually chose (22) policeman they could find to go with them. (23) this particular officer did not do this. (24) , he chose the smallest and (25) man he could find to go to the bar with him and (26) the sailor.
Another officer who (27) there was surprised when he saw the officer of the guard chose such a small man. A. was breaking
B. was ordering
C. was moving
D. was dusting
[单项选择]小儿肾功能何时达成人水平()
A. 1~1.5岁
B. 2~3岁
C. 4~5岁
D. 6~7岁
E. 8~9岁
[单选题].确定几何体划线基准的类型有( )。
A.点和线
B.线和面
C.点和面
D.点、线和面
[单项选择]病例摘要:男性,58岁,右侧腹股沟斜疝病史3年。今晨便后疝突出,不能回纳,局部疼痛,伴恶心,无呕吐6小时就诊。有关绞窄性疝,下列哪项是错误的()。
A. 疝囊内有血性渗液
B. 有急性机械性肠梗阻
C. 可引起疝外被盖组织发生蜂窝组织炎
D. 可引起粪瘘
E. 绞窄肠管血运障碍是先动脉后静脉
[单项选择]
Farmers usually use plows to prepare their fields for planting crops. Plows cut into the ground, and lift up weeds, and other unwanted plants. However, plowing is blamed for causing severe damage to top soil by removing the plants that protect soil from being blown or washed away. Many farmers in South Asia are now trying a process called Low Till Farming. Low Till Farming limits the use of plows. In this method of farming, seeds and fertilizer are put into the soil through small cuts made in the surface of the ground. Low Till Agriculture leaves much or all the soil and remains of plants on the ground. They serve as a natural fertilizer and help support the roots of future crops. They take in rain and allow it to flow into the soil instead of running off. It has been proved that Low Till Farming increases harvests and reduces water use, and this method reduces the need for chemical products because there are fewer unwanted plants. Scientists say Low Till Farming is becoming popu
A. In areas with few weeds and unwanted plants.
B. In areas with a severe shortage of water.
C. In areas lacking in chemical fertilizer.
D. In areas dependent on imported food.
[单选题] 在多人落水需要施救,应按“()”的顺序进行救援。( )
A. 先近后远,先水面后水下
B. 先远后近,先水面后水下
C. 先近后远,先水下后水面
D. 先远后近,先水下后水面
[单选题]每年9月()日前,县公司级单位组织完成下年度检修计划线下编制,并报送市公司(超高压公司)运检部
A.5
B.10
C.15
D.30
[单项选择]地高辛加强心肌收缩力作用的机制主要是通过
A. 抑制细胞膜Na+-K+-ATP酶,使细胞内Na+增加
B. 抑制细胞膜Na+-K+-ATP酶,使细胞内Ca2+增加
C. 抑制细胞膜Na+-K+-ATP酶,使细胞内Na+减少
D. 抑制细胞膜Na+-K+-ATP酶,使细胞内Ca2+减少
E. 抑制迷走神经,增强交感神经对心脏的作用
[判断题]签订师徒合同的作业人员,作业中不得分离。()
A.正确
B.错误
[判断题]在焊接时,由于温度变化而引起组织变化所产生的应力是组织应力。( )
A.正确
B.错误
[判断题]行政执法机关的行政执法经费纳入财政预算, 予以保障。
A.正确
B.错误
[单选题]下列()不是活塞与汽缸间隙大造成异响特征。
A.发出清脆的当当金属敲击声
B.随发动机转速增加,声音加大
C.怠速时最明显
D.温度升高,声音减弱或消失
[简答题]起源于德国的BB霜经过哪个亚洲国家的改良后开始流行?
[单选题] 整流式电流表能测量( )。[1.0分]
A. 交流毫安级至安培级
B. 畸变交流电流
C. 直流大电流
D. 直流微安级电流
[多选题]提速道岔工电结合部常见故障有哪些?
A.A.道岔转换卡阻,主要反映为道岔转换杆件与钢岔枕间碰卡
B.B.道岔不密贴,主要反映在单股行车的道岔上,原位时道岔密贴,但在扳到反位时,往往扳不到位,严重的离缝30mm以上,回到定位时又造成定位不密贴;
C.C.道岔出现红光带
D.D.道岔表示不良
[单项选择]只有每个从业人员都认真履行自己在安全生产方面的(),安全生产工作才有扎实的基础,才能落到实处。
A. 法定义务
B. 权利
C. 权力
[判断题]汽轮机热态启动时由于汽缸、转子的温度场是均匀的,所以启动时间短,热应力小。( )
A.正确
B.错误
[单项选择]The destruction of Agadir is an example of
[单选题]红一方面军在第二次反“围剿”中,坚持实行____的方针,取得了反“围剿”的胜利。
A.分兵退敌
B.退出中央苏区
C.诱敌深入
[单项选择]证券公司包销股票的,应在包销期满后一定期限内将包销情况报国务院证券监督管理机构备案。此处“包销期满后一定期限”是指( )。
A. 30日内
B. 45日内
C. 60 日内
D. 15日内
[单选题]在Windows菜单中,暗淡的命令名项目表示该命令( )。
A.暂时不能使用
B.正在执行
C.包含下一层菜单
D.包含对话框
[单选题]下承式简支桁粱及连续梁的边跨,其宽度与跨度之比不宜小于( )。
A.1/10
B.1/15
C.1/20
D.1/25