题目

如图所示电路，下列分析正确的是：A．只闭合S1时，L2发光、L1不发光，A2测L2电流B．只闭合S2时，L1发光、L2不发光，A1测L1电流C．闭合S1、S2时，L1、L2并联，A2测L2电流D．闭合S1、S2时，L1、L2串联，A1、A2示数相等 答案：【答案】C【解析】试题观察电路图可见：灯L1与L2并联，A1测L1电流，A2测L2电流，S1在干线上，S2在L2支路上。只闭合S1时，L1发光、L2不发光，A选项分析不正确；只闭合S2时，L1、L2均不发光，B选项分析不准确；闭合S1、S2时，L1、L2并联，A2测L2电流，C选项分析正确，选填C；D选项分析不准确。阅读下面的短文，并根据短文后的要求答题（请注意问题后的词数要求） [1]Why play sports? You might say “to get exercise” and you’d be right. To have fun? That’s true, too. But there’s more. In fact, there are at least 5 more reasons. According to the Women’s Sports Foundation, girls who play sports get a lot more than just fit. [2]Girls who play sports do better in school. You might think that athletics wi1l take up all your study time. But research shows that girls who play sports do better in school than those who don’t. Exercise improves learning, memory, and concentration, which can give active girls an advantage in the classroom. [3]Girls who play sports learn teamwork and goal-setting skills. Sports teach valuable life skills. When you work with coaches, trainers, and teammates to win games and achieve goals. you’re learning how to be successful. Those skills will        at work and in family life. [4] Sports are good for a girl’s health. In addition to being fit and maintaining (维持) a healthy weight, girls who p1ay sports are also less likely to smoke. And later in life, girls who exercise are less likely to get breast cancer or osteoporosis (骨质疏松). [5]Playing sports builds self-confidence. Girls who play sports feel better about themselves. Why? It builds confidence when you know you can achieve your goals. Sports are also a feel-good activity because they help girls get in shape, maintain a healthy weight, and make new friends. [6] Exercise cuts the pressure. Playing sports can reduce stress and help you feel a little happier. How? The brain chemicals released during exercise improve a person’s mood. Friends are another mood-lifter. And being on a team creates tight bonds between friends. It’s good to know your teammates will support you—both on and off the field! 1.What’s the main idea of the text? (no more than 8 words) 2.List three advantages that exercise can give you when you are in school. (two words for each) 3.Fill in the blanks in Paragraph 3 with proper words.(no more than 5 words) 4.Translate the underlined sentence in Paragraph 5 into Chinese. 5.What can lift your mood while playing sports? (no more than l5 words)