设备租赁与购置方案分析的步骤是( )。①拟定若干投资设备、更新方案；②定性分析筛选

门齿适于______________，臼齿适于_______________，犬齿用于___________。

光在______中沿______传播的．光在真空中传播的速度是______．光在各种介质中传播的速度都______光在真空中的传播速度．（填“大于”、“等于”或“小于”）．排纵队时，如果看到自己前面的一位同学挡住了前面所有的人，队就排直了，这可以用______来解释．

女，32岁。身高163cm，1个月前体重92kg，开始每天只吃两个苹果，现在体重降至86kg，主诉呼吸短促、无力、易感疲劳、腿痛。检验：甘油三酯2.1mmol／L，总胆固醇7.1mmol／L。

该患者的体重为（）

A.偏瘦

B.正常

C.轻度肥胖

D.中度肥胖

E.重度肥胖

Most computer systems are (71) to two different groups of attacks：insider attacks and outsider attacks．A system that is known to be (72) to an outsider attack by preventing (73) from outside can still be vulnerable to the insider attacks accomplished by abusive usage of (74) users．Detecting such abusive usage as well as attacks by outsides not only provides information on damage assessment,but also helps to prevent future attacks．These attacks are usually (75) by tools referred to as Intrusion Detection Systems．

（72）处填（）。

A．reliable

B．secure

C．indestructible

D．steady

开发利用水资源，应当服从()的总体安排，实行兴利与除害相结合的原则。

A．环境规划

B．水资源的规划

C．防灾

D．防洪