题干

短周期元素A、B、C的原子序数依次增大,其原子的最外层电子数之和为10,且A与C在周期表中位置上下相邻,B原子最外层电子数等于A原子次外层电子数,下列有关叙述不正确的是(   )

A:A与C可形成共价化合物

B:A的氢化物的稳定性大于C的氢化物的稳定性

C:原子半径:A<B<C

D:B的氧化物的熔点比A的氧化物熔点高

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C

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The World's Coolest Places

    There's nothing wrong with a relaxing week at the beach. But travel can also be an education, a step toward empathy(共鸣) and international understanding, so for those longing to escape the crowds this summer, encounter new worlds and return with a tale, here're a few little-known travel destinations I recommend.

⒈Bikini Atoll, Marshall Islands.

    This coral island in the Pacific Ocean, site of nuclear weapons tests decades ago, is now brilliantly beautiful and the deserted white-sand beaches are lined with coconut palms and scattered with seashells. The island is a reminder of the redemptive(救赎的) power of time and nature.

⒉Potosi, Bolivia.

    No city in Latin America is more beautiful than Potosi, Bolivia, where Europeans discovered a huge silver mountain centuries ago. Tourists can descend(下降) the silver mines to experience extremely hot and dusty tunnels, talk to the miners, get a glimpse of life image for Bolivians there and have new empathy for the miners.

⒊Victoria Falls, Zimbabwe.

    Maybe our family start at Victoria Falls, which wets you with spray, making Niagara Falls a backyard stream. Then we rent a car and make our way to Hwange National Park, empty of people but crowded with various animals. Zimbabwe has fewer tourists than South Africa, and there's less crime as well.

⒋Amritsar, India.

    The Golden Temple, Sikhism's holiest shrine(神殿), is a delightful place to contemplate the draw of faith. A four-century-old temple set in a lake attracts Sikhs(锡克教徒) worldwide. Walking the circuit of the lake, with your head covered, and putting up in temple buildings can be a full experience.