如图所示，在圆圈空缺处填上适当的电表符号，当电键S闭合时，两灯并联均发光，且电表正常工作。_刷题宝

题干

如图所示，在圆圈空缺处填上适当的电表符号，当电键S闭合时，两灯并联均发光，且电表正常工作。

上一题下一题 0.0难度选择题更新时间:2016-09-28 08:24:08

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找出下列与“秦人不暇自哀”句式不同的一项（）

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2007年元旦是星期一．小华的生日是1月15日，他的生日是星期____？

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撒哈拉以南非洲的一些国家为改变“单一商品经济”的局面，采取的措施中不合理的是（　　）

同类题4

The following ads are from Shenzhen Daily to help you to choose the activities that will be held during the summer holidays in England. Please sign up and join us.

	The Postal Museum Date: July 17-23 Age: 11-13 Would you like to join us this summer vacation? You can create a stamp with your own design, write and mail a postcard, and learn about the history of stamps. Tel: 965-0400
	The Air and Space Museum Date: July 29-30 Age: 8-11 If you enjoy programs about air and space, please come here, it's a good place to make and fly your own paper airplane, watch an IMAX movie, and climb into a real airplane. Tel: 654-0930
	The Science Museum Date: August 7-20 Age: 9-12 You can experience video arts and computer technology, play VR games to explore a funny city, and ask the robots questions about science. It will be wonderful! Have fun! Tel: 357-3030
	The Building Museum Date: August 21-27 Age: 13-15 Want to enjoy design challenges? Come and join us. You can also go on field trips to some famous buildings, and build small houses with soft blocks. All the programs are free. Tel: 272-0560

同类题5

已知a、b是两条不重合的直线，α、β、γ是三个两两不重合的平面，给出下列四个命题：

①若a⊥α，a⊥β，则α∥β；

②若α⊥γ，β⊥γ，则α∥β；

③若α∥β，a⊂α，b⊂β，则a∥b；

④若α∥β，α∩γ=a，β∩γ=b，则a∥b．

其中正确命题的序号有____

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