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问题 填空题

在同温同压下，同体积的甲烷（CH4）和二氧化碳分子数之比为________，物质的量之比为________，原子总数之比为________；质量之比为________，密度之比为________，

答案

1:1；1:1；5:3；4:11；4:11

选择题

His colleagues ______ him though he himself didn’t think he had done anything special.

A．thought highly of

B．looked up to

C．sing high praise of

D．show great respect for
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单项选择题

With hundreds of millions of electronic transactions taking place daily, businesses and organizations have a p incentive to protect the (66) of the data exchanged in this manner, and to positively ensure the identities of those involved in the (67) . This has led to an industry-wide quest for better, more secure methods for controlling IT operations, and for deploying p security (68) 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. (69) that can be incorporated in the hardware design of client computers. The principle of encapsulating core security capabilities in (70) 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.

A．documents

B．chips

C．appliances

D．means
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