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随着基因技术的发展,人类对自己的认识从来没有像今天这么明了。然而人类在不断揭开自身和生物界秘密的同时,伴随着深刻的忧虑。英国哲学家罗素曾经说过:科学提高了人类控制大自然的能力,同时据此认为很会增加人类的快乐与富足。这种情形只能建立在理性的基础上,但实际上,人类总是被激情和才能所束缚。引用罗素的话,意在说明:

A. 科学提高了人类控制大自然的能力
B. 科学能增强人类的快乐和富足
C. 在人类理性的基础上,科学能为人类造福
D. 如果脱离了理性的制约,科学有可能危害人类

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建筑工程施工安全技术 常用的基坑与管沟的支撑方法中,大型较深基坑开挖,临近有高层建筑物,不允许支护有较大变形时,宜采用( )。

A. 临时挡土墙支撑
B. 地下连续墙支护
C. 挡土护坡桩与描杆结合支撑
D. 挡土护坡桩支撑

某镇汽车租赁公司2009年10月发生如下业务: (1)将一个楼层租给某广告公司使用,自11月起租期三年,每月租金5万元,在当月共预收了半年租金30万元; (2)进口小轿车10辆,关税完税价格每辆20000美元,另支付自己采购代理人本次采购的购货佣金2000美元,支付代理进口公司入境后的境内运输费折人民币10000元; (3)进口大型巴士车6辆,关税完税价格每辆23000美元,另支付境外中介佣金每辆250美元; (4)当月出租各类车辆取得租金收入80万元,发生车辆修理支出10万元; (5)当月购置税控收款机一台,取得普通发票,金额3744元。 假定上述车辆均在本月领取牌照;小轿车消费税率9%;车辆关税率20%;美元与人民币汇率为1:6.8,请计算: 该租赁公司应纳的城建税金及教育费附加合计为()。

A. 3356.48元
B. 4356.48元
C. 4400元
D. 5445.6元

Many people are surprised when they find the Internet(因特网)was set up in the 1960s. At that time, computers were large and expensive. Computer networks(网络) didn’t work well. If one computer in the network broke down, then the whole network stopped. So a new network system (系统) had to be set up. It should be good enough to be used by many different computers. If a part of the network was not working, information could be sent through another part. In this way computer network system would keep on working all the time. At first the Internet was only used by the government, but in the early 1970s,universities(大学) ,hospitals and banks were allowed(允许) to use it too. However, computers were still very expensive and the Internet was difficult to use. By the start of the 1990s, computers became cheaper and easier to use. Today it is easy to get on-line(上网) and it is said that millions of people use the Internet every day. Sending e-mail is more and more popular among students. The Internet has now become one of the most important parts of people’s life. The Internet has a history of ______ years.

A. less than 30
B. about 40
C. about 20

中断处理程序从当前PSW寄存器中取出中断码来分析发生中断的事件。( )

A. 对
B. 错

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