患儿10个月龄,腹泻后丢失体重8%,血钠125mmol/L。患儿出现代谢性酸中毒,补

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问题:

患儿10个月龄,腹泻后丢失体重8%,血钠125mmol/L。

患儿出现代谢性酸中毒,补充碳酸氢钠可用公式()

A.补充的mmol数为:BE负值×0.2×体重(kg)

B.补充的5%碳酸氢钠量(ml)为:BE负值×0.5×体重(kg)

C.补充的5%碳酸氢钠量(ml)为:BE负值×0.3×体重(kg)

D.补充的mmol数为:BE负值×0.5×体重(kg)

E.补充的mmol数为:BE负值×1.4×体重(kg)

考点:儿童保健(医学高级)医学高级(儿童保健)模拟试卷一
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商检机构对《目录》外进出口商品不能实施检验。( )

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乳腺无论是发生生理性增生还是病理性增生,都与雌激素水平升高有关。

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Why is setting goals important? Because goals can help you do, be, and experience everything you want in life. Instead of just letting life happen to you, goals allow you to make your life happen.
Successful people        how their life should be and set lots of goals. By setting goals you are taking control of your life. It’s like having a         to show you where you want to go. Think of it this way. There are         drivers. One has a destination(目的地)in mind (her goal) which can be found on a map. She can drive straight there without any wasted time or wrong turns. The other driver has no goals or destination or map. She starts off at the same time from the same place as the first driver,         she drives aimlessly around, never getting anywhere, just using up gas (汽油). Which driver do you want to be?
Winners in life set goals and follow through on them. They decide what they want in life and then get there by making          and setting goals.       people just let life happen by accident. Goals aren’t difficult to set—and they aren’t difficult to reach. It’s up to you to find out what your goals really are. You are the one who must       what to achieve and in what direction to aim your life.
Research tells us that when we write a goal down, we are more        to achieve it. Written goals can be         regularly, and have more power. Like a contract(契约) with yourself, they are harder to forget. Also        you write your goals in a particular way, you are able to make yourself continuously aware of situations that will bring you nearer to your goal.
小题1:
A.imagineB.discussC.experienceD.show
小题2:
A.guideB.friendC.mapD.sign
小题3:
A.twoB.suchC.someD.both
小题4:
A.orB.andC.butD.so
小题5:
A.plansB.moneyC.friendsD.maps
小题6:
A.LuckyB.YoungC.CommonD.Unsuccessful
小题7:
A.practiseB.changeC.acceptD.decide
小题8:
A.willingB.stressedC.likelyD.worried
小题9:
A.improvedB.reviewedC.provedD.reached
小题10:
A.althoughB.untilC.whenD.before
题型:单项选择题 共用题干题

实验题:

(1)在做“用电流表和电压表测一节干电池的电动势和内电阻”实验时:

①某同学连接的实物图如右图所示。但当开关闭合时发现电压表有示数而电流表没有示数,实验前仪器都检查过是好的,也就是说只可能是某根连接导线断了。那么,请你分析一下,可能发生断路故障的导线是__________________(写出所有可能断的导线的编号)。

 

②某同学在实验时对该电路作了改进,其方法是:加接了一个定值电阻R0,如图所示。他加接此电阻的作用是                      

(2)与打点计时器一样,光电计时器也是一种研究物体运动情况的常用计时仪器,其结构如左图所示,a、b分别是光电门的激光发射和接收装置,当有物体从a、b间通过时,光电计时器就可以显示物体通过时的挡光时间。

为了测定两张纸之间的动摩擦因数,某同学利用光电计时器设计了一个实验:如右图所示,在小铁块A和木板B上贴上待测的纸,木板B水平固定,铅锤通过细线和小铁块相连。l和2是固定在木板上适当位置的两个光电门,与之连接的两个光电计时器没有画出。释放铅锤,让小铁块在木板上加速运动,光电门1、2各自连接的计时器显示的挡光时间分别为。用游标卡尺测量小铁块的宽度d如下图所示。

①读出小铁块的宽度d=               cm。

②铁块通过光电门l的速度v1=      m/s,铁块通过光电门2的速度v2=     m/s。(计算结果保留3位有效数字)

③已知当地的重力加速度为g,为完成测量,除了测量v1v2和两个光电门之间的距离L外,还需测量的物理量有(用文字说明并用字母表示)                                             

④用③中各量求解动摩擦因数的表达式:              (用字母表示)。

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如图所示,理想变压器的原副线圈匝数比n1:n2=1:10,副线圈与阻值R=20Ω的电阻相连.原线圈两端所加的电压u=20sin20πt(V),则(  )

A.副线圈输出交流电的频率为10Hz

B.交流电压表的示数为20V

C.电阻R上消耗的电功率为2kW

D.原线圈中电流的最大值为100A

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