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问题 填空题

如果两个相似三角形的对应角平分线之比为1：4，那么它们的周长之比是______．

答案

∵两个相似三角形的对应角平分线之比为1：4，

∴那么它们的周长之比是1：4．

故答案为：1：4．

计算题
解方程。

（1）2.6x+12.6=20.4（2）6.5x÷0.2=1.625
（3）8.6x-3.6x=125（4）0.09×16+0.8x=132
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单项选择题

The nurse is working in a support group for clients with acquired immunodeficiency syndrome (AIDS). Which point is most important for the nurse to stress

A．Avoiding the use of illicit drugs and alcohol.

B．Refraining from telling anyone about the diagnosis.

C．Following safer-sex practices.

D．Telling potential sex partners about the diagnosis, as required by law.
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