小张出差时恰逢抄表日，他家电能表示数为，出差返回时发现家中有一盏60W台灯亮着，检查其他电器都已切断电源，再查看电能表的示数为，则小张出差时间长达（　　）

    Mrs. Green works very long hours every day. She usually gets up(起床 ) at 5:40. She brushes her teeth(刷牙) and goes to her workplace (工作地点). Then she runs with some kids. After that she takes a shower(淋浴). she eats her breakfast at 7:00. Her work starts(开始) at 8:10. she is good at(擅长 ) history and many boys and girls learn history from her. All the kids（孩子） like her very much. She often talks or plays games with the kids. She  usually goes to bed(睡觉) after 22:00. she is often very tired(劳累) but she likes her job and loves the kids. She doesn't work on weekends. Mrs. Green likes reading at home on weekends(周末). Sometimes some kids' parents come to her home to talk about their kids. When Monday comes, Mrs. Green gets busy again.

    When my husband and I got married, he worked as a mechanic (机修工) from midnight to 8 a.m. However, I worked during the 1So as he came home from work each morning, I was getting ready to2.

    We had very little3 then, so when Valentine's Day(情人节) came around that first year, I knew we couldn't 4 anything for each other. After he left to go to work the night before Valentine's Day, I decided to5 and make a Valentine's Day card for him. I 6 wrote a poem on the front of the card. When he came home the next 7 I felt foolish as I handed him the card8 that he wouldn't laugh at it. When he had finished9 it, he slowly raised his head and looked at me. Then he reached down into his pocket. When he pulled his10out, he was holding11

    He told me that he had12 it for me during his lunch hour, but he had been 13to give it to me because he thought I might think it was14and that I might laugh at it.

    It was a small heart made out of aluminum (铝)15I had stayed up all night making him a valentine card, he had been cutting out a16 for me. I still have the aluminum heart, and I17 it in my desk. Every time I see it, all those 18come flooding back to me. Over the years, we've been able to buy each other very nice19 presents for Valentine's Day. But none has ever been as dear or20 as much as those handmade gifts made from our hearts the first year that we were married.

小明跑100米要用16（    ）。

如图所示，条形磁铁置于水平面上，电磁铁与其在同一水平面上，右端固定并保持水平，当电路中滑动变阻器滑片P逐渐向左移动时，条形磁铁仍保持静止，在此过程中条形磁铁受到的摩擦力的大小____(填“变大”、“变小”、“不变”)方向____(填“水平向左”或“水平向右”)