题目

如图是一个电路的一部分，其中R1=5Ω，R2=1Ω，R3=3Ω，I1=0.2A，I2=0.1A，那么电流表测得的电流为（ ）   A．0.2 A，方向向右   B．0.2 A，方向向左   C．0.15A，方向向左   D．0.3A，方向间右   答案：B解析:略  One morning, I was driving my father-in-law to the airport when a plane flew silently over the road like a big bird, about to touch down at the airport."It's magic," my father-in-law said. I looked at him, without knowing what was happening.He was a doctor who gave speeches at colleges and had visitedmore than 100 countries. He understood better than I why a plane can fly in the sky. It, really, wasn't magic.But now, I realize he was at least right in some way.Though flying might not be magic, it's certainly magical. What it brings to our lives is something found in our dreams.But too often, we, especially I forget. I read a sentence a few months ago. It said, "You know you're growing-up when you no longer want a window seat."Too often in recent years, I've asked for a seat near the exit row, forgetting the wonders of traveling fast. But sometimes, when the Wi-Fi's not working or my computer has no power, I remember to look.I think of one time when I was leaving on a family vacation. Moments after take-off, I started working. But a passenger behind me wouldn't stop talking. "The clouds!" he kept saying, "Look at the clouds!"I turned around, and saw two men, one who appeared to be in his seventies and the other much younger. The chat continued for 20 minutes until, not patiently, I raised my eyes from my computer screen and looked out of the window.The clouds!He was right. We were floating through big soft balls of cotton, each in different shapes. They seemed close enough to touch. The afternoon sun provided all kinds of colors, all against a blue sky. I put away my computer and appreciated(欣赏)them for the rest of the flight.I don't remember the work I felt like I had to complete that afternoon. taut I've never forgotten those clouds.1.The writer thinks flying is "magical" because .A. planes fly like a very big birdB. it has changed human lives in some waysC. he thinks planes have magic powersD. he understands well why a plane can fly in the sky2.What is the meaning of the underlined sentence in the 6th paragraph?A. Where people grow up, their minds slow down.B. When people grow up, they do not like changes.C. Adults often care too much about day-to-day work.D. Adults often feel stressed and tired after a day's work.3.How did the writer feel when he listened to the chat for 20 minutes?A. Unhappy. B. Excited. C. Interested. D. Nervous.4.The writer wrote this article to .A. explain to the readers how planes fly in the airB. tell us to look up at planes from time to timeC. remind the readers to enjoy the beauty around themD. show views from planes are better than that on the ground5.Which of the following is probably the best title for the passage?A. Is it a wonder? B. Is it magic?C. What soft clouds! D. What a strange flight!