我国常用的主要采煤方法()、()、()、大采高一次采全厚采煤法、放顶煤采煤法等.
参考答案:单一走向长壁采煤法;单一倾斜长壁采煤法;刀柱式采煤法
短文改错。
该短文中共有10处错误,每句中最多有两处,错误涉及一个单词的增加、删除或修改。
增加:在缺词处加一个漏字符号(^),并在此符号下面写出该加的词。
删除:把多余的词用斜线(\)划掉。
修改:在错的词下画一横线,并在该词下面写出修改后的词。
注意:(1) 每处错误及其修改均仅限一词:
(2) 只允许修改10处,多者(从第11处起)不计分。
After five years away in my hometown, I find that the neighborhood which I used to living in has
changed a lot. The Sichuan Restaurant and the older fish shop across the street from our middle school
were gone. There exist now a park that has a small river running through. The factory at the corner of
Friendship Street and Zhongshan Road has been moved out of the city, and sports center has been built
in their place. The market at the corner of Friendship Street and Xinhua Road has been given way to a
supermarket. Besides the bookstore next our middle school is still there.
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下列关于凝点叙述不正确的为()。
A、柴油的十六烷值不是越高越好
B、影响柴油燃烧性能的主要因素是柴油的自燃点
C、柴油的凝点不能作为最低使用温度的界限
D、柴油的沸点与凝点与化学组成无关