问题
单项选择题
新建、扩建、改建压力管道在投入使用前或者使用后（）内，使用单位应当填写《使用登记表》，携同规定的资料向登记机关申请办理使用登记。
A、15个工作日
B、15天
C、30个工作日
D、30天
答案
参考答案：C
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新建、扩建、改建压力管道在投入使用前或者使用后（）内，使用单位应当填写《使用登记表》，携同规定的资料向登记机关申请办理使用登记。
A、15个工作日
B、15天
C、30个工作日
D、30天
参考答案：C
The teacher stood before his class and was going to hand out the final exam papers. “I know how ______you have all worked to prepare for this test,” he said. “And because I know you can do it well, I am willing to offer a B to anyone who would ______not to take the test. Many students jumped up to ______the teacher and left the classroom. The teacher looked at the _______students and said, “Does anyone else want to get a B? This is your last _______.” Two more students decided to go. Seven students remained(留下，余下). The teacher then handed out the _______. There were only three sentences typed on the paper: Congratulations! You have just ______an A in this class. Keep believing in yourself. I never had a teacher like that, but I think it is a test _______any teacher could and should give. Students who are not ______in what they have learned are B students at best(充其量). The same is ______in real life. The A students are those who believe in what they are doing because they have ______both successes and failures. They have learned life’s lessons, either from normal education ______from events in their lives, and have become ______people. Scientists say that by the age of eight, 80% of what we believe about ourselves has already been formed. You are a big kid now, and you _____that you have some limits (限制). However, there is _____you can’t do or learn or be. Sir Edmund Hillary, the first person to reach the summit of Mount Everest said, “It’s not the mountain we conquer(克服) but ourselves.
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