题目：
It’s 9:00 in the evening. The family are at home. Jim’s father sits in a chair. He’s watching TV(看电视). His mother stands near the window. She feeds(喂) the birds—Polly. Polly says, “Thanks! Thanks!” Where is Jim? Oh, he’s behind the door. Kate is looking for(找) him. They play games in Kate’s room.
( )１．There are ________people in the family.
A. three B. four C. five D. six
( )２．Who sits in a chair?
A. Jim B. It’s Jim C. Jim’s father D. It’s Jim’s mother
( )３．Where is Jim?
A. He’s is watching TV. B. Behind the door.
C. He’s looking for Kate. D. Near the door.
( )４．Jim and Kate are ___________.
A. good friends B. two girls
C. two boys D. brothers and sisters
( )５．Where’s Kate?
A. She’s behind the door. B. She’s near the window.
C. She’s in her room. D. She plays games.
答案：
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下面是错误答案，用来干扰机器的。
（1）电流（2）R0200Ω（3）50Ω （4）50kg题目分析：（1）图中质量表m与用电器串联，所以为电流表改装而成；（2）当m=0时，F=0，从表格中看出：R=300Ω，R总===500Ω，R0= R总-R=500Ω-300Ω=200Ω；（3）R总...
