题干

氯化溴是由两种卤素互相结合而成的卤素互化物。其化学性质与Cl2相似,能与金属和非金属反应生成卤化物,能与水反应:BrCl+H2O   HCl+HBrO,下列有关BrCl的性质的叙述中不正确的是     

A:BrCl和NaOH溶液反应生成NaCl、NaBrO两种盐

B:BrCl具有较强的氧化性

C:能使润湿的淀粉碘化钾试纸变蓝

D:BrCl与水反应中,BrCl既是氧化剂又是还原剂

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D

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    The First Robotics Competition (FRC) was held in Shenzhen. A total of 35 high-school student teams from China, the United Kingdom, Turkey, Poland and other countries joined the two-day contest with their hand-crafted robots.

    The FRC is a world-class robotics competition that was first launched in the United States in 1989. It encourages students to improve their hands-on skills and creative capabilities.

    There are strict rules, limited resources and an intense six-week time limit before the competition. Teams of student should raise money, design a team brand and improve their teamwork skills, as well as build industrial-size robots to compete. The rules of the game include two groups, and each group has three teams. The group with the highest score wins the game.

    The seven teams who won the top prizes in the FRC  Shenzhen Regional will take part in the First Championship to be held in the United States next month.

    Yin Shifei, secretary general, said the competition not only enables students to improve their programming, decision-making and problem-solving skills, but also encourages them to cooperate and share with other people

    According to Yin, a Shenzhen team invited over 40 left-behind children to the city to watch the FRC game because they wanted to make education more equitable. And the left-behind children can get fair education. These children's parents are migrant workers in Shenzhen, but they are left behind i their hometowns.

    Shenzhen became the first city to host an FRC region in Asia last year, and another regional contest will be held in Shanghai this year.