[单选] 我国安全标志分类中不包括（）

动压效应 孤独症患儿，若出现退缩、刻板、攻击、自伤行为时，可给予下列哪项治疗（） 安定。 利培酮。 氟哌啶醇。 麦普替林。 β₂受体激动剂。 Click the Exhibit button and examine the data from the EMP table. The COMMISSION column shows the monthly commission earned by the employee. Which two tasks would require subqueries or joins in order to be performed in a single step? （） listing the employees who earn the same amount of commission as employee 3。 finding the total commission earned by the employees in department 10。 finding the number of employees who earn a commission that is higher than the average commission of the company。 listing the departments whose average commission is more than 600。 listing the employees who do not earn commission and who are working for department 20 in descending order of the employee ID。 listing the employees whose annual commission is more than 6000。 新文学第一个纯文学刊物是经文学研究会改革后的《（）》。 关于精神发育迟滞，叙述不正确的是（） 是指精神发育不全或受阻的一组综合征。 特征为智能低下、社会适应困难。 起病于发育成熟（18岁）以前。 本病只单独出现。 由生物、心理、社会因素所致。 我国安全标志分类中不包括（）