不是砼试件标准养护龄期计时始点的时点有（）。A、试件拆模时间 B、试件移入标准养护室

某商场开展购物抽奖促销活动，抽奖箱中有200张抽奖卡，其中有一等奖5张，二等奖10张，三等奖25张，其余抽奖卡无奖，某顾客购物后参加抽奖活动，他从抽奖箱中随机抽取一张，则中奖的概率为（    ）。

费用是企业发生的各项开支以及在正常生产经营活动以外的支出和损失。（）

下列各项中，作为经营活动现金流量的是( )。

A．收到从银行借入的资金

B．对子公司投资支付的现金

C．收到子公司分派的现金股利

D．以应收票据背书方式支付购买原材料价款

阅读理解。

     1_____ Scientists have learnt that Mars seems to be the planet with the best conditions for life after

Earth. 2_____ The reason is that the air on Mars is mainly made up of carbon dioxide, nitrogen, and argon,

all of which humans cannot breathe, and has only 0.13% oxygen, while the oxygen content of the air on

Earth adds up to 21%. 

     3_____ We now know there isn't enough oxygen on Mars for humans to breathe, but there are signs

of water there. NASA scientists have found ice on Mars, and there is some water in the atmosphere. The

Phoenix Mars Lander landed on the planet on May 25, 2008, to find out if there was life there, and to explore

the planet's climate and geology. 4_____ A physicist once said, "We agree that life can exist under different

conditions. We now believe that there might have been some form of life on Mars billions of years ago,

maybe deep underground. 5_____ On the question of humans going to live on Mars-well, first of all, we

have to sort out some problems. And then ... who knows?"

A. The physicist is not sure whether people will live on Mars one day.

B. Whether life can exist on Mars has been a question in the minds of space experts for a long time.

C. Humans can't breathe on Mars because there is too little air there.

D. As far as we know, for life to exist, two essentials are needed-air and water.

E. However, if people went to live on Mars tomorrow, they wouldn't be able to breathe.

F. Personally, I think that if we knew where to look, we would find life on Mars today.

G. The information that it sends back will help us prepare for sending people to explore Mars in the future.

由空警/安全员或带班乘务长妥善保管被遣返人员的证件、材料，在下机时交与被遣返人员。