题目

马明和王群在解这样一道题：“如图，在△ABC中，∠ACB=90°，点D、E在边AB上，AD=AC，BE=BC．求∠DCE的度数．”他们经过商量后，结论不一致，马明说：“∠DCE的值与∠B有关，只有告诉∠B的度数才能求出∠DCE的度数．”王群说：“∠DCE的度数是一个定值，与∠B的度数无关．”他们谁说的正确？请说明理由．完型填空 Do you often think of your parents? You may say, “Of course, I .I buy a present for my mother on Mother’s Day and on Father’s day I give my father .too.” But what about the other days of the year?I have a friend whose parents live in another city. One day I went to see her. We had a nice talk. Then she wanted to . So she dialed（拨打） the number, but then she put down the phone. After about fifteen , she dialed the number again, “Hi, Mom …” Later I asked, “ did you dial the number twice?” She smiled, “My parents are old and . They can’t get close to the telephone quickly. I always do so when I call them. I just want to give them time to answer the call. ”My friend is a good girl. She is thinking about her parents. You also want to be a child, right? Please remember to think of your parents in every situation, not just on some days.1.A. do B. will C. won’t D. don’t2.A. a cakeB. a kiss C. a present D. some money3.A. have a restB. make a callC. pay a visitD. go for a walk4.A. hoursB. minutesC. secondsD. days5.A. WhyB. WhatC. HowD. When6.A. fast B. careless C. healthy D. slow7.A. enough B. quickC. no D. little8.A. neverB. alwaysC. seldomD. sometimes9.A. bad B. cleverC. sickD. good10.A. funny B. interesting C. importantD. happy