在八大行星中，地球的“左邻右舍”是（　　）

如图所示为两个同心闭合线圈的俯视图，若内线圈中通有图示的电流I₁，则当I₁增大时关于外线圈中的感应电流I₂的方向及I₂受到的安培力F的方向，下列判断正确的是（   ）

完形填空

    The summer vacation is the best time for students．They can go outdoors and have fun．They can go to big cities to  1，or go to the countryside to 2the beauty of nature(大自然)．

    Peter is an American middle school student and he loves 3  very much．He always travels in his country．

    This summer vacation he wants to do4．He is interested in Chinese history． 5he is flying to Beijing and Xi'an for the summer vacation．He is leaving on l2th July and 6 New York on the last day of the month．He plans 7 a fantastic vacation．During the 8，he is visiting places of interest and going shopping．At night，he is  9  to enjoy the night views．,He is sure he will have a  10 time．

一颗陨石飞向地球，落入海洋的可能性为（　　）

下列各句中，没有语病的一句是（    ）