多项选择题

Which of the following are true about the principles of……

Which of the following are true about the principles of helping teachers motivate students to write? ( ) A. Encourage only individual writing. B. Provide opportunities for students to share their writings. C. Treat students errors strategically. D. Give students a sense of achievement from time to time.

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单项选择题A.B.AgBr和AgClC.D.

A.
B.AgBr和AgCl
C.
D.

单项选择题发生以下哪一种行为不需按严重违反调度纪律论处：（） A、不执行调度指令 B、故意拖延执行调度指令 C、擅自越权改变调度管辖设备状态 D、违规操作

单项选择题A.Kp=KcB.Kp=Kc×(RT)C.Kp=Kc (RT)D.Kp=1 Kc

A.Kp=Kc
B.Kp=Kc×(RT)
C.Kp=Kc/(RT)
D.Kp=1/Kc

单项选择题A.1B.2C.D.

A.1
B.2
C.
D.

问答题民间舞的特征是 A、继承性 B、群众性 C、自娱性 D、即兴性 E、适应性 F、地域性

单项选择题二尖瓣狭窄的主要表现是()

A.左心房增大
B.右心房增大
C.心脏呈靴形
D.左心室增大
E.右心室缩小