化学除草剂在环境中的归趋及残留
桑代克的学习律包括三个成分，即：准备律、效果律和（） ["联结律","反馈律","反思律","练习律"]
撰拟文稿的正确顺序是（） ["拟写提纲—安排结构—书写文稿","安排结构—书写文稿—拟写提纲","安排结构—拟写提纲—书写文稿","拟写提纲—书写文稿—安排结构"]
public class Key { private long id1； private long 1d2； // class Key methods } A programmer is developing a class Key， that will be used as a key in a standard java.util.HashMap. Which two methods should be overridden to assure that Key works correctly as a key？（） [" public int hashCode（）"," public boolean equals（Key k）"," public int compareTo（Object o）"," public boolean equals（Object o）"," public boolean compareTo（Key k）"]
气动浮筒界面计在现场如何检查零点和满量程？检查时比重阀应置于什么位置？
在篮球规则中时间类违例有哪些？
