渗透管不宜设在行车路面下，设在行车路面下时覆土深度不应小于（）。 A.100cm B

资料：CCC公司主要经营销售某国产知名品牌的计算机。据预测，该计算机产品的年销售量为1080台；为经营销售该产品，CCC公司每年发生的固定储存成本和变动储存成本分别为2000元/年和100元/台•年。发生的固定和变动订货成本分别为1000元/年和74.08元/次。公司的进货价格为每台500元，售价为每台580元；如果供应中断，单位缺货成本为80元。

订货至到货的时间为4天，在此期间销售需求的概率分布如下：

要求：在假设可以忽略各种税金影响的情况下计算（一年按360天计算）。

（1）该商品的进货经济批量。

（2）该商品按照经济批量进货时存货平均占用的资金（不含保险储备资金）。

（3）该商品按照经济批量进货的全年存货取得成本和储存成本（不含保险储备成本）。

（4）该商品含有保险储备量的再订货点。

证券买卖成功后，办理变更股东或债权人名簿记载的手续称为( )。

A．清算

B．交割

C．成交

D．过户

企业自行创造无形资产时，研发阶段发生的不符合资本化条件的支出应记入的会计科目是( )。

A．研发支出

B．生产成本

C．管理费用

D．无形资产

生态系统中的物质循环种类较多，碳循环就是其中之一，___________是含碳的主要气体,也是碳参与物质循环的形式之一。

B

The worst danger is a house on fire when people are asleep. Always be ready to leave through a window into the garden by making sure you can open it if necessary. If you should be on holiday in a tall building or hotel, make sure you know where the fire escape(太平梯) is. When you can’t find any way out, try to find pieces of cloth and make a rope to get out of a window to safety. If you smell burning in your home, get out right away. If you can’t breathe properly because of smoke on your way out, crawl(爬) on your hands and knees because smoke rises and the air will be cleaner near the floor. Smoke is a killer and more people die from breathing it in than actually being burned.

Fire in a cinema hall or public place often means people pushing to reach a door. Keep your head up with arms up in front of your chest. This protects your chest and gives you the best chance to breathe. Above all, don’t get frightened!

60. When a tall building is on fire, people______.

A.can leave by coming down the fire escape     B.should first check the room window

C.had better find a long rope                 D.must lie down on the floor at once

61. People can leave a burning house through a window if ______.

A.there is smoke in the room          B.  there is no other way out

C .they can’t breathe properly          D.  they want to put out the fire

62. There are several things to do to keep one safe. Which of the following is not talked about in the passage?

A.Leave the house right away when you smell something burning.

B.Raise your head and keep your chest from being hurt.

C.Get out of the house by crawling on the floor.

D.Rush out of the house, dressed in wet clothes.

63. Which of the following is not true?

A.In a fire, more deaths are caused by smoke.

B.The most important thing is not to be frightened in a fire.

C.When a public place is on fire, people usually push to leave.

D.Be ready to leave a burning house through a window if there is a garden down below.