已知等差数列{an}满足：a3=5，a4+a8=22．{an}的前n项和为sn．

为了研究并联电池组的电压规律，需要测量三个电池并联之后的电压．请按照要求在如图中用笔画线代替导线连接实物电路，并在方框内画出对应的电路图．

Yesterday I go shopping in the supermarket. As I was looking at the goods I noticed a old man who seemed to be following me wherever I went. As I moved, there he was, smiled at me. I wondered that if I had done something wrong. But I didn't think I had. So I believed there must be anything wrong with him. I became a bit scared. At the food section I selecting the chicken when I felt a tap on the shoulders. Turn around, I saw that it was the same man. "Lady," he final said, "youhave my shopping basket." At that moment I realized I misunderstood him, so I said sorry for him at once.

车刀在刀架上安装位置的高低对切削工作角度无影响。

楼地板层需要承受的荷载包括（）.

A.自身结构层的荷载

B.面层的荷载

C.墙身的荷载

D.家具设备的荷载

E.人活动的荷载

《建设工程价款结算暂行办法》规定，包工包料工程的预付款按合同约定拨付，原则上预付比例不高于合同金额的（）。

A．5%

B．10%

C．30%

D．50%