对变异型心绞痛最有效的药物是（） A.5-单硝酸异山梨酯  B.普萘洛尔 C.硝苯地

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       My mother is very busy every day. She works five days a week from Monday to Friday. Sometimes

she works on Saturdays or Sundays. She gets up early in the morning, She cooks breakfast for my family. After breakfast, she goes to work at 7:10. She has lunch at her work place. She comes back at about

6:40. My father cooks dinner. After dinner she does the washing. Then she goes our for a walk. Before

she goes to bed. she often reads some magazines or watches TV. She goes to sleep very late.

根据上面启事内容判断正误，正确的写T， 错误的写F。

(    ) 1. My mother is not busy every day.

(    ) 2. She gets up early in the morning.

(    ) 3. She goes to work at 8:00.

(    ) 4. She has lunch at her work place.

(    ) 5. She goes to sleep very late.

高行健的论著《》是新时期最早的“现代派”文论之一。

线性表L=(a1，a2，a3，…ai，…an)，下列说法正确的是( )。

A．每个元素都有一个直接前件和直接后件

B．线性表中至少要有一个元素

C．表中诸元素的排列顺序必须是由小到大或由大到小

D．除第一个元素和最后一个元素外，其余每个元素都有一个且只有一个直接前件和直接后件

安全生产责任制是企业最基本的安全制度，是安全规章制度的核心。

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