【判断题】对于有限长、断面是圆形的载流直导线的磁场问题,由于圆形断面具有对称性,所以可用安培环路定理来求解此导线在周围产生的磁场 。
【判断题】利用安培环路定理可以计算有对称性的磁场强度H,然后根据介质的磁化规律,即磁场强度H和磁感应强度B之间的关系,可以求得B。
【单选题】---We can use QQ to talk with each other on the Internet. ---Really? Will you please show me it?
【单选题】患者男性,49岁,因“急性心肌梗死”来诊。行冠状动脉扩张手术,并置入金属支架。期间出现心室颤动,但恢复良好,坚持服用氯吡格雷。8个月后出现上腹胀痛、黑粪,给予奥美拉唑治疗。关于氯吡格雷,叙述正确的是()
C.
是一种前体药,经氧化生成2-氧基-氯吡格雷,继而水解形成活性代谢物(一种硫醇衍生物)才有抗血小板作用
D.
广泛地经肝代谢为羧酸盐衍生物,有抗血小板聚集作用
【简答题】Cloze test. Every child has his own dream. Every child hopes to be an . 1 , is it really like what they imagine? As a boy 2 lives in modern times and in a modern city, I feel 3 pressure (压力) on m...
【单选题】听力原文:M: How did your talk with Henry go? W: It'd never really got off the ground. Q: What does the woman mean? (17)
A.
They didn't have a talk.
B.
They talked about the facts.
D.
They couldn't lake a walk.
【单选题】Las cuatro Junzi son _______________.
A.
crisantemo, albaricoque, orquídea y bambú
B.
crisantemo, peonía, orquídea, y bambú
C.
crisantemo, albaricoque, violeta y bambú
【判断题】自动扶梯发现状态不良及妨碍运行的杂物,应及时进行维护、清除,必要时通知维修人员。
【单选题】关于耐甲氧西林葡萄球菌,叙述不正确的是 ( )
C.
在琼脂筛选试验中只要有1个菌落生长,就判为耐药
D.
体外药敏试验表现为敏感的药物,临床疗效也一定好
E.
在药敏培养基中加入2%~4%氯化钠可提高耐药菌的检出率