问题
单项选择题
《煤矿安全规程》规定，局部通风机及其开关地点附近10m以内风流中，瓦斯浓度不超过（）时，方可人工开启局部通风机。
A.0.5％
B.1.O％
C.1.5％
D.2.0％
答案
参考答案：A
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《煤矿安全规程》规定，局部通风机及其开关地点附近10m以内风流中，瓦斯浓度不超过（）时，方可人工开启局部通风机。
A.0.5％
B.1.O％
C.1.5％
D.2.0％
参考答案：A
| 完形填空。 | ||||
| Collectors (收藏家) know just what to look for in a comic book. They always check the 1 first. They like to find the books that came out between 1938 and 1945. These years 2 the Golden Age of comic books. Now these books are very 3 . The first copy (册) of Marvel Comics cost a little money 4 it came out. Now it is worth more than $100,000. Collectors also look for the books in which a character 5 for the first time. The first Superman story tells how Superman came to Earth. This comic book might cost as much as $125,000. 6 a character from one comic book turns up in another one. When Batman (蝙蝠侠) is 7 in a Superman comic, the price of the book goes up. These books are called crossover books. They are worth more because there are not 8 of them. Don't let the high prices 9 you from starting a collection of your own. Comic books that came out after the Golden Age don't cost so much. Today's comic books are even 10 . You can enjoy them now and save them for their future value. | ||||
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