《钢制管法兰、垫片、紧固件》标准(HGJ44~76-1991)中包括()种法兰类型。
A.四
B.五
C.六
D.七
参考答案:B
短文改错。
Time fly like an arrow. I'm already in the second half of Senior Grade 3 before I realized it. It
is only a little more than three months before I graduate middle school. At the present, I'm busy
review my lessons in order to take the College Entrance Examination. I hope to go to Beijing
University, that is one of the best universities not only in China but also in the world. I'll try my
best turn my dream to reality. Most of my classmates are also studying very hard to realize our
wishes. I do believe everyone will be able to enter an university or college.
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巨柱式