Americans usually eat three meals a day.

题型:阅读理解

问题:

Americans usually eat three meals a day. Breakfast usually comes before eight o’clock in the morning. They usually have eggs, some meat, bread, fruit juice and coffee. Lunch is between twelve and one o’clock. It is like a light meal and working people must take lunch with them or get it near workplace.

Children in school take sandwiches, fruit, and cookies with them or eat in school. Supper, the main meal, is between six and eight in the evening. People cook it carefully. They may have meat or chicken, turkey and duck. They may all have potatoes or rice, vegetables or salad. The drink is coffee, tea or milk. Then comes the dessert.

根据短文内容选择最佳答案。

小题1:Americans have breakfast ________.

A.after eight o’clock

B.at eight o’clock

C.before eight o’clock in the morning

D.in the morning小题2: _______ is the most important meal in a day.

A.Breakfast

B.Lunch

C.Meals

D.Supper小题3: Americans usually have breakfast and supper at ______.

A.home

B.office

C.inn

D.work place小题4:When Americans have supper, _______ comes last.

A.drink

B.meat

C.dessert

D.vegetables

考点:政治经济类阅读
题型:阅读理解

假设某公司每年需外购零件4900千克,该零件单价为100元,单位储存变动成本400元,一次订货成本5000元,单位缺货成本200元,企业目前建立的保险储备量是50千克。在交货期内的需要量及其概率如下:

需要量(千克) 概率
240 0.10
260 0.20
280 0.40
300 0.20
320 0.10
要求:
(1)计算最优经济订货量、年最优订货次数;(2)按企业目前的保险储备标准,存货水平为多少时应补充订货(3)企业目前的保险储备标准是否恰当(4)按合理保险储备标准,企业的再订货点为多少

题型:阅读理解

具有两条流水线的CPU,一般情况下每个时钟周期可以执行( )。

A.一条指令

B.两条指令

C.三条指令

D.四条指令

题型:阅读理解

当某投资方案的净现值=0时,该方案的()。

A.内含报酬率=0

B.获利指数=1

C.获利指数=0

D.内含报酬率<0

E.内部收益率=给定的折现率

题型:阅读理解

血糖平衡对机体生命活动具有重要作用。如图是血糖调控模式图,据图回答:

糖尿病人最可能的原因是胰岛()细胞受损。

题型:阅读理解

根据经验:有对重的吊笼在正常使用的情况下一般3~4个月应更换。

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