采用大直径下降管有何优点？
参考答案：
采用大直径下降管，可以见效流动阻力，有利于水循环，且简化布臵、节约钢材，同时也减少了汽包的开孔数。
每小题均有一个错误，请找出，并按下列情况改正：
此题多一个词：把多余的词用斜线（\）划掉，在该行右边横线上,写出该词并也用斜线划掉。
此题缺一个词：在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。
此题错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。
小题1:The Smiths were spending their holidays in Japan while a terrible earthquake happened.
小题2:Wang Bin didn’t go to attend the lecture yesterday because his illness.
小题3:Our English teacher likes to meet with classmates out of class to discuss different subjects in English, range from the Internet to pop music.
小题4:He returned to the ball and searched the lost ring.
小题5:Great changes have been taken place in China since 1979.
下列哪项不是负压吸引术的并发症（）
A.组织残留
B.漏吸
C.宫颈裂伤
D.子宫穿孔
E.子宫卒中
