【简答题】有以下脚本: #! /bin/sh echo “Program name is $0”; echo “There are total $#parameters in this program”; echo “The result is $?”; echo “the fisrt parameter is$1” echo “the second parameter is$2” echo “The pa...
【单选题】View the Exhibit for some of the current parameter settings. A user logs in to the HR schema and issues the following commands: SQL> CREATE TABLE emp (empno NUMBER(3), ename VARCHAR2(20), sal NUMBER(8...
A.
The second user's session immediately produces the resource busy error.
B.
The second user's command executes successfully.
C.
The second user's session waits for a time period before producing the resource busy error.
【单选题】设汽车以匀速 v 通过图示路面 A 、 B 、 C 三处时,车对该三处路面的压力大小分别为 11-1. P A 、 P B 、 P C ,则 prefix="v" ns="urn:schemas-microsoft-com:vml" C prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace> B A ?xml:...