题干

小明想探究某一植物种子萌发与水分的关系,其设计方案如下表所示,你认为小明的设计中,不妥当的是哪项(  )

种子数量

光照

温度

水分

空气

50粒

有光

30℃

适量

通风

50粒

有光

10℃

少量

通风

A:光照

B:温度

C:水分

D:空气

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答案(点此获取答案解析)

B

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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.