题干

下列有关物质燃烧现象的叙述中,正确的是(  )

A:铁丝在氧气中燃烧:火星四射,生成红色固体

B:硫粉在空气中燃烧:产生淡蓝色火焰,生成一种刺激性气味的气体

C:木炭在空气中燃烧:发出白光,生成一种能使澄清石灰水变浑浊的气体

D:红磷在空气中燃烧:发出白光,生成大量的白色烟雾

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答案(点此获取答案解析)

B

同类题4

阅读短文,下列问题

Dear Liz,

    My stay in Thailand has certainly been the experience of my life.

Life is busy and exciting. Bangkok is just like any other big city with a population of 10 million and heavy traffic. I'm very lucky because my host family is in a nice quiet area outside the city. There are Mr. and Mrs. Phairat,their son Sanan, who is 18,the daughter Chinda, who is 16, and Grandpa and Grandma.

    I go to an international school with Sanan and Chinda. The school teaches about 70 percent in English, and 30 percent in Thai. I've learned some spoken language, but Thai writing is very difficult. The cooking lesson is my favourite. I'm learning all about Thai food and culture. People don't use chopsticks here, but spoons and forks. When I come back, I'm going to cook you a real Thai meal.

    Last weekend we visited some temples. We also drove to Pattaya beach near Bangkok. I thought it was great, but Sanan and Chinda say that next month they're taking me to Phuket Island, where the beaches are even more beautiful. The month after next, we're going to travel to Mr. Phairat's hometown in the north of Thailand. The Phairats own land there, and they have two elephants. I'm going to ride those elephants—and even wash them. Sanan and Chinda say it's really fun.

I'm amazed by everything in this country, especially by the elephants. Elephants are an important part of Thai culture and way of life.They have been a traditional symbol (象征) of Thailandfor many years in times of war and peace. In the seventh century, a Thai king trained 20,000 elephants for battle. I'll tell you all about my Thai boxing(拳击)lessons next time I write.

Love,

Mandy