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【多选题】
与肾上腺素相比较,去甲肾上腺素对心血管的作用特点是:
A.
与不同受体结合的能力不同于肾上腺素
B.
对α受体作用小于β受体
C.
对心脏的效应不如肾上腺素
D.
可反射性引起压力感受性反射活动增强
E.
在整体中,可引起心率加快
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【简答题】完形填空。 When I was young, I was very embarrassed (尴尬) to be seen with my father. He was disabled and very short, and he 1 with great difficulty. When we walked together, with his hand on my arm for bala...
【判断题】辅助变流器过流故障在5分钟内连续发生两次,该辅助变流器将被锁死,需要解锁时必须切断辅助变流器的控制电源,才可解锁。
A.
正确
B.
错误
【简答题】When I was growing up, I was embarrassed to be seen with my father. He was badly crippled (跛脚), and when we would walk together, his hand on my arm for balance, people would stare, I would be ashamed ...
【判断题】和谐型电力机车,辅助变流器过流故障在5分钟内连续发生两次,该辅助变流器将被锁死,需要解锁时必须切断辅助变流器的控制电源,才可解锁。
A.
正确
B.
错误
【简答题】在句子"I wonder if he sensed my reluctanceto be seen with him during our walks. If he did,I am sorry I never told him how sorry I was,how unworthy I was, how I regretted it." 中 (if he)did指代的是___________A...
【简答题】He couldn't have seen me, I was not there.
【简答题】When I was little . I was embarrassed to be seen with my father. He was short and 1 . When we walked together, he would hold my arm. People would look at us. Our usual walk was to or from the 2 statio...
【单选题】HXD3D型电力机车辅助电动机回路过载及短路保护发生时,逆变器的门极均被封锁,同时向微机控制系统发出跳主断的信号。该故障消除后10s内自动复位,如果此故障在2分钟内连续发生(),该辅助变流器将被锁死,必须重启辅助变流器的控制电源,才可解锁。
A.
2次
B.
4次
C.
6次
D.
8次
【单选题】我们在研究中,常常需要建立一个吸收与辐射达到平衡的系统,这是为了测量该系统的
A.
平衡率
B.
量子态
C.
温度
D.
朗格系数
【单选题】变动成本法的存货成本必然()完全成本法的存货成本。
A.
小于
B.
等于
C.
大于
D.
不确定
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