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【单选题】
( )阀门在开度小时流量相对变化值大,灵敏度高,不易控制,甚至发生振荡,而在大开度时,流量相对变化值小,调节缓慢,不够及时。A.
快开特性
B.
等百分比特性
C.
线性
D.
抛物线
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反馈参考答案：
举一反三
【单选题】For most students, the largest single cost of a college education is
A.
the wages given up to attend school
B.
tuition, fees, and books.
C.
room and board.
D.
transportation, parking, and entertainment.
【单选题】Each sentence below contains a comma splice. Select the answer that corrects the comma splice without creating any new errors. Note: Check the punctuation carefully. · Most students attend a learning ...
A.
Most students who attend a learning skills class, improve their grades.
B.
The grades and skills of most students improve after they attend a learning skills class.
C.
Because most students attend a learning skills class their grades and skills improve.
【单选题】Most students in grades K-12 attend school for 6 to 7 hours a day, 180 days per year. Some schools offer extended learning by adding extra time to the school day or increasing the length of the school...
A.
demand larger school budgets
B.
make more money out of the students
C.
help take care of young students
D.
improve students academically
【单选题】For most students, the largest single cost of a college education is
A.
the wages given up to attend school.
B.
tuition, fees, and books.
C.
room and board.
D.
transportation and entertainment.
【单选题】For most students, the earnings they give up to attend college are
A.
a minor cost when compared to the costs of tuition, room and board, and the like.
B.
the single largest cost of their education.
C.
about equal to the costs of room and board at college.
D.
not considered true costs by an economist.
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