题目内容

反应速度是指单位时间内,在单位体积中反应物的消耗量或产物的生成量来表示。( )

A. 对
B. 错

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半衰期(t0.5) 指反应物消耗一半所需的时间。( )

A. 对
B. 错

有效期(t0.9) 指药物降解10%所需的时间。( )

A. 对
B. 错

[音频]When did Ang Lee come to understand his father’s concern about studying film?

A. When he applied to study film at the University of Illinois.
B. When he competed for available roles on Broadway.
C. When he boarded a flight to the US.
D. When he graduated from the film school.

[音频]What was Ang Lee’s most painful experience according to the passage?

A. Helping film crews with the equipment at the beginning of his career.
B. Working as editor’s assistant at the beginning of his career.
C. Being refused repeatedly by production companies when shopping a screenplay.
D. Struggling through six years of annoying, hopeless uncertainty.

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