钢筋原材料进场检验项目中，预应力钢丝的检验项目有()。A.外观检_爱下问搜题

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问题单项选择题

钢筋原材料进场检验项目中，预应力钢丝的检验项目有()。

A.外观检查、拉力(含伸长率)、反复弯曲试验、松弛性能

B.外观检查、极限抗压强度、抗冲击强度、冷弯试验

C.极限抗拉强度、疲劳强度、延伸率、冷弯试验

D.极限抗拉强度、屈服强度、化学成分检验、冷弯试验

答案

参考答案：A

选择题

，且|x-3|-|x+2|的最大值为p，最小值为q，则pq的值是（　　）

完形填空

Like our body, our memory needs regular exercise to be in good condition. Like the sportsman who must train to allow the body to respond to difficult times, the memory needs its own special training in order to stay in “shape” and improve.
There are many factors that can cause poor memory like insomnia (失眠), depression and alcohol. However, there are simple ways which you can follow to keep your memory in shape and actually help you to improve your memory’s condition and performance.
Never stop learning. Look for topics that interest you and really get involved in learning new information about them. Reading and attending lectures or programs are sources of continuous education of your brain with beneficial results to your memory.
Develop your social and family relationships. The more social you are, the better it is for your brain. Studies have shown that the brain and heart have a lot to gain from good family and social relationships.
Exercise your mind with games. The more you use your brain, the more you help your memory stay in shape. There are many games that can make you an intelligent person as well as entertain you such as chess, puzzles and board games.
Exercise physically can improve your memory. This type of exercise improves the circulatory （血液循环的） system. Even the simple but regular daily exercise such as fast walking can improve the heart and oxygenation（供氧） of the brain. The benefits of exercise affect positively many body systems, as well as our memory and other cognitive（认知的） capabilities.
Eat more fruit and vegetables. What we eat every day affects the performance and long-term condition of our memory. Fruit and vegetables are an excellent source of antioxidants（抗氧化剂） and vitamins that can help and benefit the nervous system.
So our memory is like a sportsman. The more we practice our brains and memory, the better their performance will be.
Title: How to improve memory

Topic	小题1: like insomnia, depression and alcohol can lead to poor memory. We should exercise 小题2: to keep memory in good condition.
Ways to improve memory	Never stop learning	小题3: like reading and attending lectures or programs does good to your memory.
	Develop social and family relationships	Good family and social relationships are beneficial to your brain and contribute to 小题4: as well.
	Exercise mind with games	Play chess, puzzles or board games, which is of great benefit to your intelligence and also offers you小题5: .
	Take小题6: exercise	Physical exercise improves the 小题7: of the brain, which leads to better memory.
	Eat more fruit and vegetables.	Fruit and vegetables are 小题8: in antioxidants and vitamins that can help and benefit the nervous system.
小题9:	If we practice brains and memory more, they will 小题10: .