题目内容

风障导风法适用于顶板完整的巷道。()

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DO YOU LIKE YOUR JOB？
_Mary and Linda__ are employees of a logistics company. They are talking about the salary levels in the company._
MARY: Do you like your job？
LINDA: {A. and they have to deliver the goods in all weather conditions; B. I don’t really like it; C. Your job is not difficult; D. The cost of living is increasing dramatically these days; E. It is said that couriers of our company can earn more than 6,000 yuan a month}.
MARY: Why not？
LINDA: Because the salary is low. {A. and they have to deliver the goods in all weather conditions; B. I don’t really like it; C. Your job is not difficult; D. The cost of living is increasing dramatically these days; E. It is said that couriers of our company can earn more than 6,000 yuan a month}. I always spend more money than I earn.
MARY: Don’t complain too much. I thought you got a good salary. Your salary is much higher than the white-collar average income of this city.
LINDA: Just 4,000 yuan a month. {A. and they have to deliver the goods in all weather conditions; B. I don’t really like it; C. Your job is not difficult; D. The cost of living is increasing dramatically these days; E. It is said that couriers of our company can earn more than 6,000 yuan a month}.
MARY: But that’s a really hard job. They work long hours every day, {A. and they have to deliver the goods in all weather conditions; B. I don’t really like it; C. Your job is not difficult; D. The cost of living is increasing dramatically these days; E. It is said that couriers of our company can earn more than 6,000 yuan a month}. You just sit in the comfortable office and don’t have to work outside.
LINDA: Yeah, that’s for sure.
MARY: {A. and they have to deliver the goods in all weather conditions; B. I don’t really like it; C. Your job is not difficult; D. The cost of living is increasing dramatically these days; E. It is said that couriers of our company can earn more than 6,000 yuan a month}. You have no reason to complain.
LINDA: Maybe you’re right.

如何开展组织“人才调研”活动？

排除停风区内的瓦斯时，巷道回风流与全风压混合处的瓦斯浓度不得超过1.5%。()

下面哪个文法具有二义性()。
AA→AA|(A)|
BE→E+T|T
CE→(E)
DE→a