Which two can be transported in one AU-4？ （） [" 3 E3"," 4 E4"," 64 E1"," 21 E1 and 2 E3"," 42 E1 and 2 E3"]
定时限过电流保护一般用作本线路的（）保护及下一线路的（）保护。
The three tasks shown have been completed in order to configure a naming method： Task 1： Installed on server and client： Oracle Net Services， TCP/IP， TCP/IP protocol adaptor Task 2： Started default listener on port 1521 Task 3： Added global database name to the listener.ora file. Which naming method was configured？（） ["host naming method","local naming method","directory naming method","external naming method"]
精神发育迟滞的主要临床表现为（） ["智能发育障碍","情感障碍","感觉障碍","知觉障碍","行为障碍"]
工业化的含义及衡量指标。
按下列公式s（n）12+22……+n2编写计算并输出s值，其中的n值由键盘输入。
