应用系统促进发展需要（） ["规范对硬件的要求","了解桌面发展趋势","预留系统接口满足增长","提前投入"]
Which command displays the number of packets transmitted for each NIC available on the system?（） ["entstat -v","netstat -i","entstat -aon","netstat -na"]
自阀手柄在常用制动区时，列车管减压量由（）的减压量来决定的。 ["工作风缸","过充风缸","均衡风缸","降压风缸"]
Given the following statements: CREATE TABLE tab1 (col1 INT); CREATE TABLE tab2 (col1 INT); CREATE TRIGGER trig1 AFTER UPDATE ON tab1 REFERENCING NEW AS new1 FOR EACH ROW MODE DB2SQL INSERT INTO tab2 VALUES(new1.col1); INSERT INTO tab1 VALUES(2),(3); What is the result of the following query? SELECT count(*) FROM tab2;（） ["3","2","1","0"]
《中学教师专业标准》善于（）。
致酸离子和盐基离子
