低压电机在运行中突然停机（现象是热继电器动作），盘上有什么显示？我们应如何检查和处理

渗出性胸腔积液，各种不同性质的胸腔积液化验特点是（）

A．乳样，乙醚试验苏丹Ⅲ染成红色

B．草黄色微浊，细胞数＞500×10⁶/L、蛋白30g/L，LDH300IU/L

C．LDH＞500IU/L、LZM(溶菌酶)与ADA(腺苷脱氨酶)正常

D．胸液蛋白/血清蛋白＜0.5、LDH＜200IU/L、胸液LDH/血LDH＜0.6

E．RBC＞5×10⁹/L、细胞数＜400×10⁶/L

含有个级、万级和亿级的数，最多是（    ）位数，最少是（    ）位数。

松木属于阔叶树种。

马斯洛认为决定人们行为的需要是( )

A．高级需要
B．低级需要
C．优势需要
D．长远需要

Object-oriented analysis (OOA) is a semiformal specification technique for the object-oriented paradigm. Object-oriented analysis consists of three steps. The first step is (96) . It determines how the various results are computed by the product and presents this information in the form of a (97) and associated scenarios. The second is (98) , which determines the classes and their attributes, then determines the interrelationships and interaction among the classes. The last step is (99) , which determines the actions performed by or to each class or subclass and presents this information in the form of (100)

A．collaboration diagram

B．sequence diagram

C．use-case diagram

D．activity diagram