丁烷罐在冬季由于罐压及罐温度都比较低，故为保证丁烷配比泵正常运行需（） ["打开液化气罐和丁烷罐平衡气管线上阀门充压","控制丁烷配比泵出口流量"]
简述命名空间的两种引用方式。
（）的作用方向恒定，与运动方向无关。 ["反抗转矩","离心式转矩","位能转矩","恒功率转矩"]
民事诉讼中的禁制令包括哪几种？
Examine this statement: SELECT student_id, gpa FROM student_grades WHERE gpa > &&value; You run the statement once, and when prompted you enter a value of 2.0. A report is produced. What happens when you run the statement a second time?（） ["An error is returned.","You are prompted to enter a new value.","A report is produced that matches the first report produced.","You are asked whether you want a new value or if you want to run the report based on the previous value."]
分子机械理论
