工程项目变更文件中的变更令附件一般包括变更工作的( )。
A．工程量表
B．设计资料
C．设计图纸
D．具体内容
E．项目名称
参考答案：A,B,C
关于Du血型的理解是（）
A.习惯上称之为弱D
B.是D抗原的一种变异型
C.Du血型的人在献血时作为趾阳性对待
D.Du型红细胞间接抗入球蛋白试验阴性
E.Du血型的人在接受输血时应视为Rh阳性
In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet.
The key to SNMP (71) is its simplicity. It has a small command set that does a good job of collecting information from (72) any network device. In a SNMP environment, (73) of the work is handled by the network management system. Devices that are being managed are not (74) with processing (75) that might affect their performance.
71（）
A．popularity
B．function
C．efficiency
D．power
