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【简答题】
A una mujer _____ aspecto de tener más _____ veinticinco años, no le preguntes _____ la edad .
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【简答题】Unit 1 Chemical Industries课后练习1
【单选题】An atom is a basic structural unit of matter， the smallest particle of an element _________ into chemical combination.
A.
that can enter
B.
can it ente
C.
when entering it can
D.
that enters can
【简答题】The versatility of chemical engineering originates in training to the practice of breaking up a complex process into individual physical steps, called unit operations, and into the chemical reactions.
【简答题】Unit 3 Typical Activities of Chemical Engineers 课后练习1
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