在如图所示的电器中，工作时将电能全部转化为内能的是（ ）

    What a lesson for me! It was August and it was hot. I had to wear a tie to do a survey door by door in this neighbourhood, but I was always refused. I finally caught on and began with “Before you close the door, I am not selling anything and I just need to ask a few questions about yourself and the community”.

    The young woman inside the doorway stopped for a moment, confused by my rude introduction and finally said, “Sure. Come on in. Don't mind the mess. It's hard to keep up with my kids.”

    “I just need to ask a few questions about yourself and your family. Although this may sound personal, I won't need to use your names. This information will be used.” She interrupted me. “Would you like a glass of cold water? You look like you've had a rough day.” “Why yes!” I said gratefully. Just as she returned with the water, a man came walking in the front door. It was her husband. “Joe, this man is here to do a survey.” I stood and politely introduced myself.

    “Joe works for the town,” she said. “What do you do?” I asked. She jumped right in not letting him answer. “Joe collects garbage. You know I'm so proud of him.”

    There was a silence. I didn't know what to say. I shook my head searching for the right words. “That's unbelievable! Most people would not be satisfied with a job like that. It certainly is a difficult one. But your attitude about it is amazing.” I said.

    She walked over to the shelf. As she returned she held a small framed（装裱）paper, walking toward Joe. “I have always been proud of him and always will be. You see I don't think the job makes the man, but the man makes the job!” she said as she handed me the paper.

    It said: If a man is called to be a cleaner, he should clean streets so well that all the hosts of heaven and earth will pause to say, “Here lived a great cleaner who did his job well.”

阅读理解

    A new study suggests that washing dishes by hand is healthier than using a dishwasher.

    Nobody likes doing the dishes, but it turns out that doing this task might pay off in an unexpected way. According to a new study published in the Journal of Pediatrics, washing dishes by hand instead of using a dishwasher might prevent the development of allergies (过敏).

    Researchers in Sweden surveyed the parents of 1,029 children aged 7 and 8. They discovered that children whose families hand-washed the dishes instead of using a machine were less likely to have allergies.

    Earlier research has shown that dishes washed by machine are cleaner than those washed by hand. So why would kids who eat with slightly dirtier plates be better when it comes to preventing allergies? One explanation is based on a theory known as the “hygiene hypothesis,” which says the reason why kids develop allergies is that their environment is actually too clean. Your immune system keeps you healthy by fighting germs like viruses and bacteria. But when you have allergies, it overreacts and tries to fight ordinary things like pollen(花粉) or certain foods.

    Being exposed to germs, especially early in life is good training for the immune system, says the lead author of the study, Dr. Bill Hesselmar of Queen Silvia Hospital in Sweden. “You stimulate the immune system in various ways and it becomes tolerant.”

    This study shows that while using the dishwasher might be easier, the old-fashioned method of cleaning up could be better for your health.

手指投影灯玩具，调节它到墙壁的距离，墙上会出现如图所示清晰的喜羊羊图象，则墙上的喜羊羊是____ （选填“实像”或“虚像”），该像相对于物是____ （选填“正立”或“倒立”）．