天然气含水污油罐罐的回流管线,必须装置紧急切断阀。
参考答案:错
–Do you think most of the people in Beijing can talk with foreigners in English?
-- Yes, I think so. ________the young ________the old are learning to speak English.
A.Either ; or
B.Neither ; nor
C.Not only ; but also
D.not ; but
刘秀在上山海经表中明确记载,汉宣帝之时,击磻石於上郡,发现一石室,现一人,械一足,被发反缚。后经证实他是()
A.窫窳
B.危
C.贰负
D.刘向