多项选择题

原油的一次加工通常由（）三个主要环节组成。‌
‍‌
‍‌

A．预处理
B．原油蒸馏
C．常压蒸馏
D．减压蒸馏

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单项选择题

Which of the following statements about disability discrimination law is NOT true?

A．The requirements only effect employers of more than 20 employees
B．For an individual to be defined as a disabled person, the physical or mental impairment must have an adverse effect of more than 12 months' duration
C．Public bodies have additional duties to protect and promote equality for disabled people
D．Employers must adjust working arrangements or the physical features of premises to remove any disadvantage to disabled people

单项选择题

第一次国际环保大会,于（）年，在（）举行。

A．1978年; 法国
B．1976年；美国
C．1972年；瑞典
D．1969年；英国