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【多选题】
增塑剂可以降低硝化纤维素膜的脆性,使涂膜柔软、持久,减少膜层的收缩和开裂现象,增塑剂有两类:一类是溶剂型增塑剂,如磷酸三甲苯酯、( )、柠檬酸三乙酯、邻苯二甲酸二辛酯等,这类增塑 剂既是硝化纤维素的溶剂,也是增塑剂,常用的是邻苯二甲酸酯类;另一类是非溶剂型增塑剂,如樟脑和蓖麻油等,一般与溶剂型增塑剂一起使用。A.
苯甲酸苄酯
B.
磷酸三丁酯
C.
乙醇
D.
甘油
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【单选题】Which of the following is true?
A.
The baby's calling to the dog told the prince that it was an unfaithful dog.
B.
At last the Prince found his son in the cradle.
C.
In fact the dog had killed a wolf which was eating the baby.
D.
Ever since he realized what he had done, the Prince never recovered from his sorrow.
【单选题】If the brothers get a dog, which of these is least likely to happen?
A.
Ishmael will run with the dog.
B.
Isadore will make videos of the dog.
C.
They will always agree on what to do with the dog.
D.
They will argue about who walks the dog.
【单选题】下面选项中,哪句英语表达是询问地铁出口的句子____。
A.
Which stop should I get off at？
B.
Which exit should I take?
C.
Where is the entrance to the subway？
D.
Where is the platform for line 4?
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