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[判断题]防触电安全防护用品主要有电容型验电器、绝缘杆、绝缘胶垫、绝缘靴、绝缘手套、防静电服等。A.
正确
B.
错误
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【单选题】关于实现消费者均衡的条件，不正确的是（ ）
A.
在基数效用论下，商品的边际效用之比等于其价格之比
B.
在序数效用论下，两种商品的边际替代率等于其价格之比
C.
基数效用论和序数效用论的均衡条件实质上相同的
D.
均衡条件下，消费者增加一种商品消费的数量所带来的效用增量一定大于另一种商品所带来的效用减少量
【单选题】若将某有序树 T 转换为二叉树 T1，则 T 中结点的后（根）序序列就是 T1 中结点的 （） 遍历序列。例如下图(a)所示的有序树转化为二叉树后如图(b)所示。
A.
先序
B.
中序
C.
后序
D.
层序
【简答题】小明同学在做“探究电流与电压的关系”实验时,准备了以下器材:干电池(1.5V)两节,电流表(0∼0.6A 0∼3A)、电压表(0∼3V 0∼15V)、滑动变阻器(20Ω、2A)、定值电阻(5Ω)、开关各一只、导线若干,根据图甲所示的电路图进行实验。 (1)用笔画线代替导线,按照图甲所示电路,将乙图中的实物图连接完整___________。 (2)闭合开关,发现电流表无示数,电压表指针有明显偏转,原...
【简答题】用适当的短语填空look back on; be happy with; make use of; be fond of; for free; more than; in charge of; according to; come up with; make sure1.I think you should complain, unless, of course, you __________ t...
【单选题】I was too scared around that teacher for the rest of my young life to think very well in her presence. But I took the message with me and gradually examined and valued it. I don't recommend humiliatin...
A.
She was the best teacher she ever had.
B.
She was the worst teacher she ever had.
C.
She taught her an important lesson.
D.
She valued the intelligence of her pupils.
【简答题】用DY2201A数字万用表测量蓄电池电压的步骤 1. 选择工具: ____ 。 2. 检测工具(直观检查和通电检查),判断工具是否正常。 1检查9V电池:打开电源开关,观察显示屏上是否出现电池符号,判断电量是否 ____ ? 2选择档位:调节选择与量程开关,指向 ____ 。 3插入表笔:红表笔插入 ____ ,黑表笔插入 ____ 。 4检查蜂鸣器是否发声: 将红、黑表笔 ____ ,听蜂鸣器是...
【单选题】听力原文：W: Our English teacher told me that the final exam would cover the first ten Units out of the total twenty. M: Really? I thought it would only include the last four Units. Then I must spend the n...
A.
Six Units.
B.
Fourteen Units.
C.
Sixteen Units.
D.
Ten Units.
【简答题】The teacher examined the students on the ________ lesson.
【单选题】听力原文：W: Our English teacher told me that the final exam would cover the first ten Units out of the total twenty. M: Really? I thought it would only include the last four Units. Then I must spend the n...
A.
Six Units.
B.
Fourteen Units.
C.
Sixteen Units.
D.
Ten Units.
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