皮皮学，免费搜题
登录
搜题
【单选题】
下列有关偶然误差论述不正确的是?
A.
偶然误差具有随机性
B.
偶然误差具有单向性
C.
偶然误差在分析中是无法避免的
D.
偶然误差的数值大小、正负出现的机会是均等的
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
【单选题】患者,女性,34岁。突发左侧肢体活动不灵,体检:意识清,失语,心律不齐,心率106次/分,脉搏86次/分,左上肢肌力0级.下肢肌力2级,偏身感觉障碍。首先考虑的疾病是( ) prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
脑血栓形成
B.
脑栓塞
C.
脑出血
D.
短暂性脑缺血发作
E.
蛛网膜下腔出血 prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
查看完整题目与答案
【单选题】用离心泵在两个敞口容器间输送液体。若维持两容器的液面高度不变，当关小输送管道的阀门后，管道总阻力( )。
A.
增加；
B.
减小；
C.
不变；
D.
不确定
查看完整题目与答案
【简答题】用离心泵在两个敞口容器间输液。若维持两容器的液面高度不变,当关小输送管道的阀门后,管道总阻力将____
查看完整题目与答案
【判断题】变压器围栏上应有“止步,高压危险!”的明显标志。
A.
正确
B.
错误
查看完整题目与答案
【简答题】用can, can't, do, don't, doesn't, does完成句子。 1. —_______ he play soccer well? —Yes, he can. 2. I _______ play the guitar, but I can't play it well. 3. —_______ your mother want to join the basketball cl...
查看完整题目与答案
【单选题】用离心泵在两个敞口容器间输送液体。若维持两容器的液面高度不变，则当输送管道上的阀门关小后，管路总阻力将()。
A.
增大;
B.
不变;
C.
减小;
D.
不确定。
查看完整题目与答案
【简答题】听对话，选答案。 (      )1. A. He doesn't have a gift. B. He can't dance. C. He doesn't know anyone at the party. (     )2. A. Under the bed. B. On the bed. C. Beside the bed. (     )3. A. Very well. B. Have ...
查看完整题目与答案
【简答题】听材料，回答问题。 1. Does Tom have a soccer ball? A. No, he isn't. B. Yes, he does. C. No, he doesn't. 2. Does Tom have a basketball? A. Yes, he is. B. Yes, he does. C. No, he doesn't.
查看完整题目与答案
【简答题】句型转换 1. He didn't participate in the .    He didn't the .
查看完整题目与答案
【简答题】用所给词语填空。 1. He didn't feel quite well, (或许) 2. ______ (也许) he hasn't left the train yet , and we can still find him. 3. Don't worry , the news (可能不) be true 4. —Why doesn't he come yet? —I don't know....
查看完整题目与答案
相关题目：
【单选题】患者,女性,34岁。突发左侧肢体活动不灵,体检:意识清,失语,心律不齐,心率106次/分,脉搏86次/分,左上肢肌力0级.下肢肌力2级,偏身感觉障碍。首先考虑的疾病是( ) prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
脑血栓形成
B.
脑栓塞
C.
脑出血
D.
短暂性脑缺血发作
E.
蛛网膜下腔出血 prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
查看完整题目与答案
【单选题】用离心泵在两个敞口容器间输送液体。若维持两容器的液面高度不变，当关小输送管道的阀门后，管道总阻力( )。
A.
增加；
B.
减小；
C.
不变；
D.
不确定
查看完整题目与答案
【简答题】用离心泵在两个敞口容器间输液。若维持两容器的液面高度不变,当关小输送管道的阀门后,管道总阻力将____
查看完整题目与答案
【判断题】变压器围栏上应有“止步,高压危险!”的明显标志。
A.
正确
B.
错误
查看完整题目与答案
【简答题】用can, can't, do, don't, doesn't, does完成句子。 1. —_______ he play soccer well? —Yes, he can. 2. I _______ play the guitar, but I can't play it well. 3. —_______ your mother want to join the basketball cl...
查看完整题目与答案
【单选题】用离心泵在两个敞口容器间输送液体。若维持两容器的液面高度不变，则当输送管道上的阀门关小后，管路总阻力将()。
A.
增大;
B.
不变;
C.
减小;
D.
不确定。
查看完整题目与答案
【简答题】听对话，选答案。 (      )1. A. He doesn't have a gift. B. He can't dance. C. He doesn't know anyone at the party. (     )2. A. Under the bed. B. On the bed. C. Beside the bed. (     )3. A. Very well. B. Have ...
查看完整题目与答案
【简答题】听材料，回答问题。 1. Does Tom have a soccer ball? A. No, he isn't. B. Yes, he does. C. No, he doesn't. 2. Does Tom have a basketball? A. Yes, he is. B. Yes, he does. C. No, he doesn't.
查看完整题目与答案
【简答题】句型转换 1. He didn't participate in the .    He didn't the .
查看完整题目与答案
【简答题】用所给词语填空。 1. He didn't feel quite well, (或许) 2. ______ (也许) he hasn't left the train yet , and we can still find him. 3. Don't worry , the news (可能不) be true 4. —Why doesn't he come yet? —I don't know....
查看完整题目与答案