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【单选题】
有关罐区的清洁保养作业描述不正确的是：（）A.
卸油口上锁，油品标识要清楚，如有污渍使用清洁剂及抹布进行清洁
B.
量油口的盖子应密封，定期使用清洁剂进行清洁和保养。
C.
油罐人内如有积水，应使用清洁工具将干。油泵、法兰接头、阀门等天晴时应及时通风
D.
因加油站24小时营业，卸油口没必要上锁
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举一反三
【简答题】The dramatic decline in the enrollment of foreign students in the U.S after September 11 was caused by________.
【简答题】What is the present percentage of men college students in the U.S. ?
【单选题】What has happened to the U.S. and Britain in terms of overseas students?
A.
The U.S. stays firmly as No. 1 choice for students.
B.
Britain raised by 20 percent its overseas students last year.
C.
Both countries forecast a rise in the student number.
D.
Both countries are losing their market share.
【单选题】Why is scientific training becoming less attractive to U. S. students?
A.
Because the U. S. students are unwilling to face the competitions between them and foreign students.
B.
Because it is not so rewarding in this career path as before due to the increasing amount of students.
C.
Because foreign students take up good position in this field for their advantage.
D.
Because U. S. students do not think scientific training can help them make a lot of money.
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