一朵花的组成不包括()。 ["种子","花冠","花托","花被"]
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。
潘月亭、李石清和(),构成了一个既互为对照又互为补充的“三段式”人物链。
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"]
试述消费者购买行为类型?