Mr. King works very long hours every day. He usually gets up at 5:30. He brushes his teeth quickly and goes to his workplace (工作地点). Then he runs with some kids. After that he takes a shower. He eats his breakfast at 7:00. His work starts at 8:10. He is good at math and many boys and girls learn math from him. All the kids like him very much. He often talks or plays games with the kids. He usually goes to bed after 22:00. He is often very tired but he likes his job and loves the kids. He doesn’t work on weekends. Mr. King likes reading at home on weekends. Sometimes some kids’ parents come to his home to talk about their kids. When Monday comes, Mr. King gets busy again

按照题目要求作图．
（1）如图甲所示的钢丝钳，其中A是剪钢丝处，B为手的用力点，O为转动轴（支点），右图为单侧钳柄及相连部分示意图．请在右图中画出钢丝钳剪钢丝时的动力臂L₁以及阻力F₂的示意图．
（2） 用如图乙所示的滑轮组提升重物，请用笔画线组装成最省力的滑轮组．
（3） 请在如图丙所示中的两个虚线框内，选填 “电源”和 “开关”的符号，并满足当开关都闭合时两灯组成并联电路．

下表中所列分子的性质和实验现象无关的是(  )

—_______ she ________ her room now?

—No, she isn't. She is watching TV.