题目

如图，⊙O的直径CD过弦AB的中点G，∠AOD=60°，则∠DCB等于（ ） A．120°                  B．100°                    C．50°                     D．30°      答案：D解：∵⊙O的直径CD过弦AB的中点G， ∴=， ∴∠DCB=∠AOD=30°（等弧所对的圆周角是所对的圆心角的一半）．A little boy was spending his Saturday morning playing in his sandbox. While creating roads in the soft sand, he   36  a large rock in the middle of the sandbox. The boy   37  around the rock, managing to move it out from the dirt. With much   38 , he tried to push the rock out of the sandbox. When the boy got the rock to the edge(边缘) of the sandbox,   39 , he found that he couldn’t   40  it up and over the little wall. The rock was too   41  for his small body. As he   42  to accept his failure, the little boy dug, pushed, and pried(撬动), but every time he thought he had made some   43 , the rock rolled and then fell back into the sandbox. The little boy   44  again and again, but the only   45  was to have the rock roll back.  46 , he burst into tears. All this time the boy’s father   47  him from his living room. The moment the tears fell, a   48  voice rose above the boy’s head. It was his father.  49 , but firmly(坚定地) he said, “Son, why didn’t you use all the   50  that you had? The boy replied with tears, “But I did, Daddy, I did! I   51  all that I had!” “No, son, you didn’t,”  52  the father kindly. “You didn’t   53  me to help you.” With that the father picked up the rock and   54  it out of the sandbox. Are you discovering that you don’t have the strength to move your “rocks” away? There is ONE who is always willing to   55  you with the strength you need. We also need that strength, especially in our daily life.【小题1】A．hidB．leftC．putD．discovered【小题2】A．walkedB．jumpedC．traveledD．dug【小题3】A．courageB．prideC．effortD．pleasure【小题4】A．howeverB．stillC．thusD．even【小题5】A．putB．raiseC．takeD．break【小题6】A．largeB．difficultC．hardD．much【小题7】A．decidedB．refusedC．agreedD．planned【小题8】A．inventionsB．progressC．mistakes D．changes【小题9】A．triedB．failedC．thoughtD．started【小题10】A．successB．goalC．resultD．wish【小题11】A．GraduallyB．latelyC．ProperlyD．Finally【小题12】A．watchedB．helpedC．followedD．taught【小题13】A．loudB．happyC．sweetD．strict【小题14】A．AngrilyB．MovinglyC．SuddenlyD．Gently【小题15】A．knowledgeB．strengthC．toolsD．ability【小题16】A．wastedB．broughtC．usedD．carried【小题17】A．repliedB．correctedC．shoutedD．praised【小题18】A．adviseB．forceC．askD．want【小题19】A．collectedB．threwC．choseD．broke【小题20】A．provideB．lendC．showD．pass