问题
填空题
如图所示,R1=5 Ω,R2=10 Ω,R3=15 Ω, 某同学将一电流表接在R2的两端, 发现示数为1.5A, 据此可推知U= _____V; 若用一只电压表接在R2的两端, 则电压表的示数为 ______V.
答案
30；10
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如图所示,R1=5 Ω,R2=10 Ω,R3=15 Ω, 某同学将一电流表接在R2的两端, 发现示数为1.5A, 据此可推知U= _____V; 若用一只电压表接在R2的两端, 则电压表的示数为 ______V.
30；10
| 完形填空。 One day two brothers went fishing. They had a dog with them. When they came near the river, they threw caps __1__ a big stone and went to the river bank to __2__. It __3__ cold that day, __4__soon they began to want their caps. They __5__ the dog to go back __6__them. When the dog got there, he tried to take the two caps together in his __7__ at the same time. It was very difficult. Then the dog saw that one __8__ the caps was smaller __9__ the other. He put the smaller cap in the _10__ one and took them to the two brothers. | ||||
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