问题
选择题
如图所示，MN是电场中某一条电场线上的两点，若负电荷由M移到N时，电荷克服电场力做功，下列说法中不正确的是
A．M点和N点之间一定有电势差
B．M点的场强一定大于N点的场强
C．电场线的方向从M指向N
D．M点的电势大于N点的电势
答案
答案：B
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如图所示，MN是电场中某一条电场线上的两点，若负电荷由M移到N时，电荷克服电场力做功，下列说法中不正确的是
A．M点和N点之间一定有电势差
B．M点的场强一定大于N点的场强
C．电场线的方向从M指向N
D．M点的电势大于N点的电势
答案：B
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| I live in London and I was on my way to visit my cousins in Wales. I was driving on the motorway at around 70 mph when somehow I couldn't __1__ my car. I was involved in a scary collision with a smaller car, which had a family with three young children. __2__, no one was hurt but the experience was very frightening. There was so much smoke that my first __3__ was to just get out of my car as fast as possible. I could __4__ the children from the car behind me screaming and crying as I was trying to get out of my car. When I got out, I could see their mum was trying to __5__ her crying children and move them away from the smoking car at the same time. I kept thinking "Oh my god, these children are so young" and I felt so __6__ that I'd collided with them. I thought it would be __7__ that the parents would be so angry and upset at me. But instead of being angry, the mum simply said to me, "Come here. You need to join in our hug." It was such a wonderful, warm __8__ from someone whose family had just been hit by me! I can't tell you how __9__ I was by that. While this was happening, the father was trying to get the children's coats out of the back of his car __10__ it was freezing. He didn't see what had happened but when he came back, he asked me if I was okay and then gave me a hug too! I couldn't __11__ it! I remember thinking how lucky those children were to be __12__ by such amazing parents who would comfort a stranger in the middle of their own fear and panic! | |||
| ( )1.A.change ( )2.A.Hopefully ( )3.A.thought ( )4.A.sense ( )5.A.impress ( )6.A.disappointed ( )7.A.illegal ( )8.A.reward ( )9.A.moved ( )10A.unless ( )11.A.possess ( )12.A.taken up | B．move B．Fortunately B．plan B．keep B．conserve B．sensitive B．natural B．gift B．satisfied B．when B．believe B．picked up | C．repair C．Regretfully C．decision C．observe C．comfort C．despaired C．necessary C．gesture C．embarrassed C．though C．forgive C．brought up | D．control D．Thankfully D．intention D．hear D．please D．guilty D．impossible D．lesson D．annoyed D．because D．receive D．built up |