关于乳化剂的亲水亲油平衡值HLB，以下哪些说法是正确的：
A. HLB为0时，亲水性为0
B. HLB为0时，亲水性为100%
C. HLB为0时，亲油性为100%
D. HLB小于10时，乳化剂一般为亲水性强
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Who should be responsible for the death of the last Duchess?
A. The duchess herself
B. unknown
C. the duke
D. the duchess's mistress
What kind of lady is the Duchess?
A. indifferent
B. arrogant
C. pretty and lovely
D. boring
The rhyme scheme of My Last Duchess:
A. aabb...
B. abab...
What kind of man is the duke?
A. possessive
B. cruel
C. arrogant
D. hierarchical
E. generous
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