再吸收塔的主要作用是()。
A、脱除CO2
B、脱除C2H4
C、吸收EO,控制水合比
D、洗涤MEG
参考答案:C
She is very_______ about her success, though she’s achieved a lot.
A.careful
B.certain
C.modest
D.anxious
口语运用。
在下列横线上填入合适的单词,使对话完整通顺。
Tom: Good afternoon.
Jim: Good afternoon.
Tom: 1 are you?
Jim: I'm fine, thank you. And you?
Tom: I'm 2 .Thank you. Who is the girl?
Jim: She is my sister. She is a 3 .
Tom: Is she 4 English teacher?
Jim: Yes, she is.
Tom: 5 is the boy?
Jim: He is my brother. He is a student.