弹簧回转数与出力两组变量之间的相关性为（）。 A.强正相关 B.强负相关 C.弱正相

已知f（x）=ax²+bx是定义在[a-1，2a]上的偶函数，那么a+b=（    ）。

1．责任来自于社会关系中的                  

2．我们在社会中生活扮演着                  的角色，每一种角色都意味着一种                  

3．一个人首先要对                      负责，也是对他人负责，对                 负责。

冲击波作用于人体后因释放能量而产生的各种损伤称为冲击伤或爆震伤，一般所指冲击波作用的"靶器官"是（）。

A.听器

B.眼

C.喉头

D.肺

E.腹内脏器

Ravi, like many project (126) , had studied the waterfall model of software development as the primary software life-cycle (127) . He was all set to use it for an upcoming project, his first assignment. However, Ravi found that the waterfall model could not be used because the customer wanted the software delivered in stages, something that implied that the system had to be delivered and built in (128) and not as (129) .
The situation in many other projects is not very different. The real world rarely presents a problem in which a standard process, or the process used in a previous project, is the best choice. To be the most suitable, an existing process must be (130) to the new problem. A development process, even after tailoring, generally cannot handle change requests. To accommodate change requests without losing control of the project, you must supplement the development process with a requirement change management process.

A．modified

B．used

C．suited

D．tailored

女性，58岁，因慢性阻塞性肺疾病呼吸衰竭住院，行气管插管机械通气支持。1天后神志已转清，PaCO₂由10．6kPa（80nmfftg）降至5．1kPa（38mmHg）

为预防或避免呼吸机相关肺炎，应特别注意（）

A.避免使用H₂受体阻滞剂，防止胃液pH升高

B.防止呕吐物吸入

C.预防性应用高效、广谱抗生素

D.静脉应用高剂量丙种球蛋白

E.把患者安置于隔离病室