阅读下面短文，从A、B、C、D四个选项中，选出最佳选项。

    Julie is my aunt and she works at a radio station. She 1 it is an interesting job. Today I ask her about 2 life.     

    She says she is very busy from Monday to Friday. She goes to work at 7:30 and 3 at 20:00. Then she watches TV 4 half an hour. She goes to bed at 21:00. On Saturdays, she either plays tennis 5 goes swimming. They are 6 for her. What does she 7 do on Sundays? She always goes to the dance club. She is good at 8. My last question is not easy for her. I ask, “You like dancing. 9 not be a dancer?” She says, “I likes to talk to people through (通过) the 10. I can help more people in this way. Dancing is just my hobby (爱好), not my job.”

小明游玩了意大利比萨斜塔后，买了一个模型，当模型塔静止在水平桌面上时（如图），小明对模型塔的分析不正确的是（　　）

“抗体”是一种什么物质              (    )

如图所示，一单匝矩形线圈abcd，已知ab边长为l₁，bc边长为l₂，在磁感应强度为B的匀强磁场中绕OO′轴以角速度ω从图示位置开始匀速转动，则t时刻线圈中的感应电动势为（   ）