循环系统应挖在离塔基及场房（）米以外，并防止漏失或雨水的侵入。A、0.2B、0.5C

Which of the following statements about securities exchanges is TRUE（）

A. Continuous markets are markets where trades occur 24 hours per day.

B. Call markets are markets in which the stock is only traded at specific times.

C. Setting a negotiated price to clear the market is a method that is never used in major continuous markets.

---- Do remember to charge the battery 12 hours when you first use it.

---- _____.[ ]

A. Made it     

B. Got it

C. Understood it  

D. Remembered it

在探究种子萌发的外界条件实验中，据下列处理分析回答正确的是（　　）

A．1号瓶和2号瓶是对照变量是空气

B．2号3号种子都可以正常萌发

C．实验中每一瓶中用1粒种子和每瓶中用10粒种子的效果和作用是一样的

D．从实验可以得出种子萌发的外界条件是：一定的水，充足的空气和适宜的温度

试述电动机接线的检查包括哪些内容？如何检查？

奥苏贝尔按学习的发生方式将学习的发生分为（）

A.发现学习

B.机械学习

C.接受学习

D.有意义学习