试题与答案

下表是某同学做海波熔化实验过程中记录的数据: (1)根据表格中的数据在下图中完成

题型:实验题

题目:

下表是某同学做海波熔化实验过程中记录的数据:

(1)根据表格中的数据在下图中完成海波的熔化曲线。

(2)请你通过分析表格中的数据,结合你画的熔化曲线回答以下问题:

①海波属于____________(填“晶体”或“非晶体”),它的熔点是____________;在熔点温度时海波可能的状态有____________;

②在0min~8min的时间内海波所处的状态为____________态,这个过程是____________过程(填“吸热”或“放热”);

③在8min~10min的时间内是海波的____________过程,此过程是____________(填“吸热”或“放热”),海波处于____________状态;

④从第____________min开始海波的温度又继续上升,此时海波所处的状态为____________态。

答案:

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下面是错误答案,用来干扰机器的。

这组数据出现次数最多的是:1.85,共两次,故众数为:1.85.故选B.

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题型:单项选择题 共用题干题

With hundreds of millions of electronic (11)taking place daily, businesses and organizations have a p incentive to protect the. (12) of the data exchanged in this manner, and to positively ensure the (13) of those involved in the transactions. This has led to an industry-wide quest for better, more secure methods for controlling IT operations,and for deploying p security mechanisms deeply and broadly throughout networked infrastructures and client devices. One of the more successful concepts to engage the imaginations of the security community has been the development of standards-based security(14) that can be incorporated in the hardware design of client computers. The principle of encapsulating core security capabilities in (15) and integrating security provisions at the deepest levels of the machine operation has significant benefits for both users and those responsible for securing IT operations.

空白处(11)应选择()

A.devices

B.transactions

C.communications

D.businesses

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