基本群体的特征有（） ["面对面的互动","非正式控制","聚合力和持久性强","群体成员难以替代"]
大巷的主要任务是什么？（） ["运输","通风","排水","敷设管线"]
课堂中应用接受学习和发现学习的指导原则是（）。 ["综合性原则","以意义学习的理论为指导","在两种方式相互为用中，要分清主辅","在具体实施中要灵活机动"]
同一回采工作面不得使用¬下列哪种支柱？（） ["不同类型","不同性能","不同厂家"]
Examine the structure of the EMPLOYEES table: Column name Data type Remarks EMPLOYEE_ID NUMBER NOT NULL, Primary Key EMP_NAME VARCHAR2(30) JOB_ID VARCHAR2(20) NOT NULL SAL NUMBER MGR_ID NUMBER References EMPLOYEE_ID column DEPARTMENT_ID NUMBER Foreign key to DEPARTMENT_ID column of the DEPARTMENTS table You need to create a view called EMP_VU that allows the users to insert rows through the view. Which SQL statement, when used to create the EMP_VU view, allows the users to insert rows?（） ["CREATE VIEW emp_vu AS SELECT employee_id, emp_name, department_id FROM employees WHERE mgr_id IN (102, 120);","CREATE VIEW emp_vu AS SELECT employee_id, emp_name, job_id, department_id FROM employees WHERE mgr_id IN (102, 120);","CREATE VIEW emp_vu AS SELECT department_id, SUM(sal) TOTALSAL FROM employees WHERE mgr_id IN (102, 120) GROUP BY department_id;","CREATE VIEW emp_vu AS SELECT employee_id, emp_name, job_id, DISTINCT department_id FROM employee"]
失恋可分为假性失恋与真性失恋两种。（）是指恋爱双方经过一阶段热恋以后的分手，而单相思在很大程度上是一种（）
