题目

下列有关能量转化和守恒的说法正确的是（） A . 用电器通电工作时，将其他形式的能转化为电能 B . 氢氧化钠与盐酸反应是放热反应，该反应将内能转化为化学能 C . 植物光合作用合成有机物，说明能量可以创生 D . “既要马儿跑，又要马儿不吃草”违背了能量转化和守恒定律 答案：DDear Abby， I’m a helpless mother．My son Tom is 15 years old．I find that the older he grows，the less we talk．I feel very sad and I really need help． My first problem is about his hobbies．He spends almost all his spare time on computer games．When he gets home．he always turns on the computer and closes the door．I’m getting worried about him，especially when his English teacher tells me he always gets low marks in the English exams． Second，he likes new technology，but I don’t have enough money and I can’t afford all the things he wants． Recently，I’ve found that he is always alone．I’ve never seen him talking to his friends on the phone or going out with anyone on weekends．That is the last problem I have． What should I do to help him?Please give me some advice． A helpless mother1.The helpless mother has________problems．A．twoB．threeC．fourD．five2.Tom________for almost all his spare time at home．A．plays computer gamesB．talks with his motherC．does his homeworkD．practises typing（打字）3.From the passage we know that Tom’s mother________．A．is not worried about TomB．feels very happyC．is not richD．likes new technology4.The helpless mother asks Abby to________．A．play with TomB．talk to TomC．buy what Tom wantsD．give her some advice5.Which of the following is TRUE about Tom?A．He is 14 years old．B．He is not good at English．C．He often phones to his friends．D．He likes going out on weekends．