下列说法错误的是[ ] A.奥斯特发现了“电能生磁” B.电动机的工作原理是通电

题型:选择题

问题:

下列说法错误的是[ ]

A.奥斯特发现了“电能生磁”

B.电动机的工作原理是通电线圈在磁场中受力转动

C.电动机工作时将电能转化为机械能

D.电动机和发电机的实质是一样的

考点:奥斯特的实验直流电动机
题型:选择题

以下是有关动物的叙述,正确的是(  )

A.在天空中飞翔的蜻蜓,其体表与我们人的皮肤一样柔软而有弹性

B.生物分类上,泥鳅、青蛙、五步蛇、蝙蝠等无脊椎动物归为一类,蚯蚓、虾、蜘蛛、瓢虫等脊椎动物归为另一类

C.海蜇和涡虫身体上的同一个开口既用于取食又用于排便

D.无脊椎动物的胚后发育都是变态发育

题型:选择题

类风湿性关节炎急性期()。

A.超短波

B.红外线

C.微波

D.蜡疗后按摩

E.不能用上述治疗

题型:选择题

It does not have to be January 1st to give yourself a chance to make the most out of your day. Every day is a new day and a fresh start to learn, grow, develop your strengths, free yourself from past regrets or hurts, and move forward older and wiser. Every day gives you a chance to reinvent (重新审视) yourself. It is never too late to change things that are not working in your life.

Each day is a new beginning and a piece of blank paper. How would you like to create your day? What would you like to paint on it? If you wake up in a negative mind, you are more likely to paint a dark picture throughout the day, and your picture will not show hope, happiness and joy.

If you take each day to think actively, and have a positive intention(意图) for how you would like to create your day, how would your life be different? What can daily positive intentions do for you? Every day you will give yourself the gift of an “attitude of gratitude(感恩)”.

Each day is a chance to look at things in a different way. You can experience each day in the beauty of the world-and the beauty of you who are in it! You find yourself changing from “I can’t” to “I can”. With a focus on positive intentions, you feel you are full of power and more like a “winner” than a “loser”.

You pay more attention to the present, and will be more likely to live fully in the present each moment of each day. After all, the past is a great place to visit, but you don’t want to live there! So how about starting each day taking a moment to think of a positive intention for the day?

小题1:The first paragraph mainly tells us     .

A.We should make every day a new start.

B.January 1st is the most important day.

C.Learning is helpful in reinventing ourselves.

D.We needn’t change ourselves at all.小题2: If you have daily positive intentions, you will     .

A.get a positive result

B.have a busy life

C.get gifts from others

D.be a complete loser小题3:From the passage we can learn that     .

A.past regrets or hurts can make you older and wiser.

B.think actively and you will be a winner, not a loser.

C.the present is not where you should live for ever.

D.positive intentions for each day are of great help.

题型:选择题

促使孙中山由改良走上革命道路的重大事件是()

A.公车上书

B.百日维新

C.中日甲午战争

D.八国联军侵华战争

题型:选择题

BB2x面板上的A,B两个LED指示灯分别指示两路()工作状态。

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