[多选]
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? （）

A . listing the employees who earn the same amount of commission as employee 3
B . finding the total commission earned by the employees in department 10
C . finding the number of employees who earn a commission that is higher than the average commission of the company
D . listing the departments whose average commission is more than 600
E . listing the employees who do not earn commission and who are working for department 20 in descending order of the employee ID
F . listing the employees whose annual commission is more than 6000

呼吸肌训练有三种形式，是（）、（）、（） Which statement about using McAfee and Webroot together is true？（） it is not recommended： the system will not detect more malware。 it is notpossible ： the WSA will accept only one anti-malware license。 the system will stop all web-based threats。 it is recommended： the system will detect more malware。动压效应我国安全标志分类中不包括（）禁止标志。警告标志。指令标志。提示标志。【背景资料】高新技术企业新建厂区某8层框架结构办公楼工程，采用公开招标的方式选定A公司作为施工总承包，施工合同中双方约定钢筋、水泥等主材由业主供应，其他结构材料及装饰装修材料均有总承包单位负责采购。施工过程中，发生以下事件：事件一：钢筋第一批进场时，供货商只提供了出厂合格证，业主指令总承包单位对该批钢筋进行了现场验证，总承包单位对钢材的品种、型号、见证取样进行了质量验证。对钢筋的屈服强度、抗拉强度进行了复试。事件二：总承包单位按《建筑工程质量管理条例》规定，对商品砼、砂石、砌墙材料、石材、胶合板实行备案证明管理。请根据上述背景资料完成以下选项对进场钢筋钢筋的品种、级别、规格和数量必须符合设计要求，其检查方法是（）。观察、钢尺检查。靠尺和塞尺检查。水准仪检查。检查产品合格证明书。

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? （）

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[多选] 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? （）

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[多选]
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? （）