One day Jack’s wife was cleaning out a closet(壁橱).
"Look at all these umbrellas," she said to Jack. "There are eight and they are all broken."
"I’ll take them to the umbrella shop and have them mended," Jack said.
Jack took the eight umbrellas to the shop and left them there. "They’ll be ready tomorrow," the shopkeeper said.
That evening Jack went home from the office by bus as usual. He sat next to an old woman. She had an umbrella on the floor near her.
When the bus reached his stop, he picked up her umbrella and stood up. "Hey!" the woman said. "That’s my umbrella !"
"I’m sorry," Jack said, and at the same time he gave the umbrella to her. "I wasn’t thinking. Please excuse me."
The next day he got back the umbrellas from the umbrella shop and got on the bus.
As he sat down, a voice behind him said, "You certainly have a successful day!"
He turned around and saw the woman whose umbrella had almost been taken by him the day before.
（）had the broken umbrellas mended in the umbrella shop.
A．Jack’s wife
B．Jack
C．The shopkeeper
D．The old woman
sin100πt （V）的 正弦交流电源，图中电流表内阻不计．副线圈接入“110V，60W”灯泡一只，且灯光正常发光．下列说法正确的是（ ）
/22 A
