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设某企业的装卸工年产量最可能估计值为5600吨，先进估计值为6720吨，保守估计值为4960吨，请回答如下问题。

用估工法计算的定额为（）吨。

A.5600

B.5680

C.6100

D.6700

E.6720

答案

参考答案：B

完形填空

Julia’s Chinese name is Liu Min.She is in Class 6 and her telephone number is 756－4321. She has a brother, his name is Adam. He is a tall boy, he has(有) some good friends at school. Julia and her brother like apples very much. Julia’s favourite colour is white, but Adam likes black. 黑色是他最爱的颜色. They are in China now, their Chinese teacher is Miss Wang. She is a good teacher.

小题1:把第（1）句译成汉语。

_____________________________________________________.

小题2:把第（黑色是他最爱的颜色）句译成英语。

____________________________________________________.

回答问题。

小题3:Who is their Chinese teacher? 

____________________________________________________.

小题4:What is Julia’s telephone number?

___________________________________________________.

小题5:A  re Julia and Adam in China now?

_____________________________________________________
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选择题

市场上出售的“热敷带”的主要成分是铁屑、碳粉、木屑、少量的氯化钠、水等。“热敷带”启用之前用塑料袋密封，启用时，打开塑料袋轻轻揉搓就会放出热量。使用完后，会产生大量铁锈。

（1）“热敷带”放热的原理是：______________________________________________

（2）碳粉的作用是：          氯化钠的作用是：_____________________________

（3）有关电极反应是：________________________________________________________

随后反应为：_____________________________________________________________
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