问题
选择题
反应2SO2＋O2
2SO3经一段时间后，SO3的浓度增加了0．4mol/L，在这段时间内用O2表示的反应速率为0．04 mol/(L·s)。则这段时间为 [ ]
A．0．1s
B．2．5s
C．5s
D．10s
答案
答案：C
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反应2SO2＋O22SO3经一段时间后，SO3的浓度增加了0．4mol/L，在这段时间内用O2表示的反应速率为0．04 mol/(L·s)。则这段时间为 [ ]
A．0．1s
B．2．5s
C．5s
D．10s
答案：C
Cancy is now with her parents. But she was stolen as a baby on Aug. 4, 1987. “It’s a wonderful feeling. Now I can sleep,” mother Joy White said after her grown-up daughter over the weekend, “I never took her picture off my dresser. I never looking for her.” Cancy was not yet a month old she was stolen. She had a and her worried parents took her to hospital. A woman dressed as a got close to Joy White in the emergency room and told her everything would be .Joy went home to rest. When she returned to the hospital ,Cancy was gone. , a girl known as Nejdra grew up in Bridgeport. As a teenager, she began to doubt that she wasn’t concerned with the family that her. And she was puzzled that she was able to get a copy of her birth certificate（出生证明）. Finally, she began to do some on the Internet. On a website, she found a photo of a baby named Cancy. The site got in touch with Joy White on Jan.4 and her a baby photo taken by the family who raised Nejdra. “I was shouting. I was so excited,”Joy said, “ I saw the picture I said, ‘That’s my daughter.’ I saw myself in her.” DNA tests Nejdra is Cancy --- the daughter of Joy White and Carl Tyson.“I already knew in my heart that this was my daughter,” Tyson said.DNA检测证实Nejdra是凯西。
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