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【单选题】
有关HLB值的错误表述是A.
表面活性剂分子中亲水和亲油基团对油或水的综合亲和力称为亲油平衡值
B.
HLB值在8～18的表面活性剂，适合用作O/W型乳化剂
C.
亲水性表面活性剂有较低的HLB值，亲油性表面活性剂有较高的HLB值
D.
非离子表面活性剂的HLB值有加和性
E.
根据经验，一般将表面活性剂的HLB值限定在0～20之间
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【单选题】Which of the following statements CANNOT be inferred from the passage?
A.
People are increasingly able to see the damage they are doing to the ocean,but to solve th e problems,they will meet with great difficulties.
B.
By the middle of the century,the edible fish will have harmful effects on human health.
C.
Earth is not exactly named,because the ocean covers almost three quarters of the planet.
D.
High temperature can damage corals and encourage organisms to migrate towards the poles in search of cooler waters.
【简答题】阅读理解。 The Great Fire of London started in the very early hours of September 2, 1666. In four days it destroyed more than three-quarters of the old city, where most of the houses were wooden and close ...
【单选题】of the teachers in our school live in the newly-built apartment .
A.
Three fourth
B.
Three quarter
C.
Third fourths
D.
Th ree quarters
【单选题】It has been estimated that the earth's surface temperature has increased one quarter to three quarters of a degree since 1805.
A.
to
B.
by
C.
at
D.
with
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