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【单选题】
关于电疗安全措施的描述，错误的是A.
电疗仪器必须接地
B.
患者接受治疗期间不得看书报
C.
治疗部位有钢板可进行低频电疗
D.
患者不得自行调节仪器输出电钮
E.
低频电疗仪不与高频治疗仪用同一线路
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知识点：
皮皮学刷刷变学霸
举一反三
【判断题】Make sure you give yourself enough time to complete your usual morning ritual without having to rush yourself or stress out.
A.
正确
B.
错误
【简答题】Without noticing it we may fail to ___ enough time and effort in maintaining our relationships.
【单选题】—They have hurried to the concert without us. — There is quite enough time to spare.
A.
You said it.
B.
You don’t say!
C.
You can say that again.
D.
You don't know the half of it!
【单选题】如图9-6所示,某台液压泵如果不是直接从液面为大气压力的油箱中吸油,而是采用压力位P2的辅助低压系统向该泵供油。假设泵转速、效率以及液压缸的负载F均不变,试说明采用辅助低压系统后下述参数如何变化:1、泵的输出压力P1();2、泵的输出流量q();3、泵的输入功率P()。
A.
增大、不变、不变
B.
增大、不变、减小
C.
不变、不变、减小
【单选题】-They have hurried to the concert without us. - There is quite enough time to spare.
A.
You said it.
B.
You don't know the half of it!
C.
You can say that again.
D.
You don ' t say!
【单选题】Without putting in enough time and energy, your chances of success in learning second language is ( ).
A.
slam
B.
slim
【单选题】某台液压泵如果不是直接从液面为大气压的油箱中吸油，而是采用压力为p2的辅助低压系统向该泵供油。假设泵转速、效率以及液压缸的负载均不变，试分析采用辅助低压系统后，泵的输出流量qp 如何变化？
A.
增大；
B.
减小；
C.
不变；
D.
先增大后减小。
相关题目：
【简答题】Without noticing it we may fail to ___ enough time and effort in maintaining our relationships.