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【单选题】
下列关于气瓶的使用方法,错误的的是:A.
开阀时要慢慢开启，防止产生静电；开阀时不能用钢搬手敲击瓶阀，以防产生火花。
B.
或手套上和工具上沾染有油脂时不要操作氧气瓶。
C.
瓶内混有水分常会加速气体对气瓶内壁的腐蚀，特别是氧、氯、一氧化碳等气体，盛装这些气体的气瓶在装气前，尤其是在进厂水压试验以后，应该进行干燥。
D.
气瓶使用到最后时可以不留有。
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【单选题】Question 4. All of the following are mentioned in the passage EXCEPT that _______. ----- Passage 3 ----- Colleges, and graduate programs, are in trouble. Enrollments are falling — and not just at the ...
A.
When Charles Sykes published his new book, student loan debt was approaching a new high.
B.
Not everyone — probably not even most people — will really benefit from college.
C.
Neither students nor society are getting their money’s worth.
D.
It is very difficult to find a job with a college degree.
【单选题】History of OxfordAs the oldest university in the English-speaking world, Oxford is a unique and historic institution. There is no clear date of foundation, but teaching existed at Oxford in some form ...
A.
Henry II was indifferent to English students.
B.
Edward III paid tribute to Oxford for its great contribution to learning.
C.
Charles I held a counter-Parliament in Oxford.
D.
John Henry Newman became a Roman Catholic in 1840.
【单选题】History of OxfordAs the oldest university in the English-speaking world, Oxford is a unique and historic institution. There is no clear date of foundation, but teaching existed at Oxford in some form ...
A.
Henry II was indifferent to English students.
B.
Edward III paid tribute to Oxford for its great contribution to learning.
C.
Charles I held a counter-Parliament in Oxford.
D.
John Henry Newman became a Roman Catholic in 1840.
【单选题】Question 4. All of the following are mentioned in the passage EXCEPT that _______. ----- Passage 3 ----- (Para. 1) Colleges, and graduate programs, are in trouble. Enrollments are falling — and not ju...
A.
When Charles Sykes published his new book, student loan debt was approaching a new high.
B.
Not everyone — probably not even most people — will really benefit from college.
C.
Neither students nor society are getting their money’s worth.
D.
It is very difficult to find a job with a college degree.
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