从剖面观察,牙可以分为A.牙冠、牙髓、牙本质、牙骨质 B.釉质、牙本质、牙骨质、牙髓

题型:单项选择题

问题:

从剖面观察,牙可以分为

A.牙冠、牙髓、牙本质、牙骨质

B.釉质、牙本质、牙骨质、牙髓

C.牙根、牙髓,牙本质、牙骨质

D.牙根、牙颈、牙髓

E.釉质、牙根,牙颈

考点:口腔医学技术(主管技师)口腔技师基础知识中级口腔医学主管技师基础知识3
题型:单项选择题

阅读理解.

A Happy Sunday

     I have four goldfishes in my room. They are very beautiful. I love them very much. On weekdays, I'm

always busy. I must study and do homework and so on, so I have no time to care (照顾)  them.

     But today is Sunday, I am very free. Then, I start to enjoy my goldfishes. They are colorful, but each

has a big mouth, two small eyes and a long tail(尾巴). I take the food and intend (打算) to feed  them.

They are very intelligent(聪明). It seems that they know I will feed them, so they are coming  up  from

everywhere. Everyone is opening up its big mouth and waiting for the delicious food. I am  smiling! They

look very lovely! Then, I put the food into the tank (水缸). They are eating it very quickly. I  enjoy this

process(过程) very much!

     Today, I am really happy! What a happy Sunday!

1. How many goldfishes are there in the home?

________________________________________________

2. Why can not the writer(作者) care the goldfishes on weekdays?

________________________________________________

3. What do the goldfishes look like?

________________________________________________

4. When can the writer feed the goldfishes?

________________________________________________

5. Does the writer have a good time on Sunday?

题型:单项选择题

我国家庭电路中的电压是______,对人体的安全电压是______;无线电通讯是利用______传输信号的,它在真空中的传播速度为______.

题型:单项选择题

前房角切开术的适应证是()

A.先天性青光眼

B.无晶状体性青光眼

C.慢性单纯性青光眼

D.急性闭角型青光眼

题型:单项选择题

(1)如图所示为用打点计时器验证机械能守恒定律的实验装置.关于这一实验,下列说法中正确的是______

A.打点计时器应接直流电源

B.应先释放纸带,后接通电源打点

C.需使用秒表测出重物下落的时间

D.测出纸带上两点迹间的距离,可知重物相应的下落高度

(2)在用电火花计时器(或电磁打点计时器)研究匀变速直  线运动的实验中,某同学打出了一条纸带.已知计时器打点的时间间隔为0.02s,他按打点先后顺序每5个点取1个计数点,得到了O、A、B、C、D等几个计数点,如图所示,则相邻两个计数点之间的时间间隔为______s.用刻度尺量得OA=1.50cm、AB=1.90cm、BC=2.30cm、CD=2.70cm.由此可知,纸带做______运动(选填“匀加速”或“匀减速”),打C点时纸带的速度大小为______m/s.

题型:单项选择题

在沟通中听分为很多种,最有效的听是()

A、假装地聆听

B、有选择聆听

C、专注地聆听

D、同理心聆听

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