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问题 解答题

等腰直角三角形的一条直角边是3厘米，它的面积是4.5平方厘米．______（判断对错）

答案

3×3÷2=4.5（平方厘米）

答：它的面积是4.5平方厘米．

故答案为：√．

单项选择题

营养性缺铁性贫血患儿可停止应用铁剂的情况是（）

A.治疗1个月后停药

B.血红蛋白量恢复正常后停药

C.血红蛋白量正常后3个月停药

D.血红蛋白量正常后2个月停药

E.红细胞计数恢复正常后停药
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单项选择题

Certificates are （71） documents attesting to the （72） of a public key to an individual or other entity. They allow verification of the claim that a given public key does in fact belong to a given individual. Certificates help prevent someone from using a phony key to （73） someone else. In their simplest form, Certificates contain a public key and a name. As commonly used, a Certificate also contains an （74） date, the name of the CA that issued the Certificate, a serial number, and perhaps other information. Most importantly, it contains the digital （75） of the certificate issuer. The most widely accepted format for certificates is X.509, thus, Certificates can be read or written by any application complying with X.509.

A．impersonate

B． personate

C．damage

D．control
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