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【判断题】
硫酸钡在塑料中还有着色作用A.
正确
B.
错误
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【简答题】两段导线AB=BC=0.1 m，在B处连接成60°角.使导线ABC在匀强磁场中匀速运动.已知导线运动的速度ν=1.5 m/s，运动方向垂直于AB，如图8-8所示，磁感应强度B=2.5×10－2T.导线上的电势差U= V， 点的电势高.
【单选题】肝性脑病患者使用精氨酸的目的是
A.
使肠内呈碱性，减少氨的吸收
B.
防止酸碱平衡的紊乱
C.
改善肝功能
D.
抑制脑内神经递质的合成
E.
与游离氨结合，从而降低血氨
【单选题】关于紫外线消毒居室下列说法正确的是
A.
确保室内没有其他人
B.
将活动紫外线车置于居室某处,将灯管拉起
C.
调节并设置紫外线消毒时间为50分钟,开启开关
D.
关门后房间要上锁,挂警示标志“紫外线消毒中,勿进!”
【简答题】如图所示,黑客入侵到R4路由器,并设置好LoopBack地址,这样的作用是什么?
【简答题】1) 3. A . It suspended diplomatic relations with Libya . B . It urged tourists to leave Tunisia immediately . C . It shut down two border crossings with Libya . D . It launched a fierce attack against...
【简答题】河流袭夺的原因有哪两种?
【单选题】选出与题干意思相近的选项 Many people may not want to retire early because it would do harm to their mental and emotional well-being.
A.
But even if people are able to economically support a retirement at 65, over thirty years of potential inactivity is harmful to cognitive and emotional vitality. Many people may simply not want to do it.
B.
A multi-stage life will have profound changes not just in how you manage your career, but also in your approach to life. An increasingly important skill will be your ability to deal with change and even welcome it.
C.
In a three-stage life, people leave university at the same time, they tend to start their careers and family at the same age, they proceed through middle management all roughly the same time, and then move into retirement within a few years of each other. In a multi-stage life, you could be an undergraduate at 20, 40, or 60; a manager at 30, 50 or 70; and become an independent producer at any age.
D.
A three-stage life has few transitions, while a multi-stage life has many. That is why being self-aware, investing in broader networks of friends, and being open to new ideas will become even more crucial skills.
【简答题】两段导线AB=BC=0．1 m，在B处连接成60°角．使导线ABC在匀强磁场中匀速运动．已知导线运动的速度v=1．5 m／s，运动方向垂直于AB，如图8-8所示，磁感应强度B=2．5×10-2T．导线上的电势差U=____V，____点的电势高．
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