以下不是差速器的主要作用是（）。 A.实现差速转向 B.进行车辆的最终减速 C.改变

句子加工厂（按要求改写句子）。  

1. 我担心怕他忘记，再三重复对他说了一遍。（修改病句）  

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2. 一位年轻漂亮、神色庄重又略显疲惫的妇人走上讲台。（缩句） 

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3. 居里夫人在讲话。 （扩句）

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The nurse is teaching family members of a client with hepatitis A virus (HAV). Family members were exposed to the client and, therefore, should receive immunoglobulin. The nurse should tell the family members that immunoglobulin

A. prevents hepatitis infection in all people.
B. provides immunity for life.
C. must be administered within 2 weeks of exposure.
D. should be administered even if the person has anti-HAV antibodies.

下列选项中不属于约束带应观察的项目是

A．衬垫是否垫好

B．约束带是否牢靠

C．体位是否舒适

D．局部皮肤颜色及温度

E．神智是否清楚

面对即将到来的中考，小娟心慌意乱，整日愁眉不展。可见[ ]

A．学习压力没有给小娟带来了不良的影响 

B．小娟的学习压力并不大  

C．小娟需要正确对待学习压力，学会将学习压力转化为学习动力 

D．小娟的学习压力没有必要缓解

什么是设立界说？