真空管道进行气压试验时，其试验压力应为（）。 A．设计压力的1_爱下问搜题

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问题单项选择题

真空管道进行气压试验时，其试验压力应为（）。

A．设计压力的1.0倍

B．设计压力的1.15倍

C．设计压力的1.25倍

D．0.2MPa

答案

参考答案：D

解析：

承受内压钢管及有色金属管的试验压力应为设计压力的1.15倍，真空管道的试验压力应为0.2MPa。当管道的设计压力大于0.6MPa时，必须有设计文件规定或经建设单位同意，方可用气体进行压力试验。

完形填空

When I was nine years old, I used to go to the post office with my mother, to send greeting cards to my aunt in Singapore. To me, these trips were really       memories. And receiving mail through a mailbox outside our gate was just as exciting.
My small hands could      get the mail without using a key! I could never       to see how much I was getting. Oh, a letter! From Singapore! I would run back home and show it to my      . When there was a letter for me, I wouldn’t run—I would open it right there.
After my family moved back to Singapore, I        going to the post office. Years later, my company sent me to Shanghai, and the post office found me again. Two years ago I celebrated my      with five friends on top of the mountain in Longsheng, China. At sunrise we       up to enjoy a beautiful view from the mountain top. Later in the afternoon, as we were going       the mountain and returning from the sunrise viewing place, a small     caught our attention. It only sold noodles, coffee and had a China       sign.
We asked the owner if she could really send mail. She happily said yes. It seemed hard to believe       we were at the highest point of the mountain. I picked one postcard out and asked my friends to write        a birthday note. We bought a stamp, wrote some notes and gave the shop owner the postcard. Three weeks later, I arrived home and      my mailbox. Hello, postcard! I broke into a big smile.
That birthday postcard attracted me again to the post office. I had      the post office all these years. Today I      send postcards to friends. And every time I am at the post office buying stamps, I cannot help but smile—how one postcard will make its way across the world and brighten up someone’s day.

选择题

面对即将来临的高校毕业生就业压力，政府出台了一些户籍优惠政策、金融资助政策，为毕业生打造良好的创业环境，通过大学生自主创业带动社会就业。这表明[ ]

①政府履行经济建设职能②政府在履行社会公共服务职能③政府可以包办一切④政府为人民服务的能力和水平不断提高

A．①③

B．②④

C．②③

D．①④