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【单选题】
【超】【2015新课标II卷理综化学】N A 代表加德罗常数的值。下列叙述正确的是( )A.
60g丙醇中存在的共价键总数为10N A
B.
1L 0.1mol·L - 1 的NaHCO 3 溶液中HCO 3 - 和CO 3 2 - 离子数之和为0.1N A
C.
钠在空气中燃烧可生成多种氧化物。23g钠充分燃烧时转移电子数为1N A
D.
235g核互 U发生裂变反应: U+ n Sr+ U+10 n,净产 生的中子( n)数为10N A
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【判断题】from para 8 , we know even if Helen gave up her care to her husband for he spent little time with Helen, Helen and her children were still dependent on money earned by Phil
A.
正确
B.
错误
【简答题】听短文填空。 Husband Wife He was a small, 1. ______ man. He worked in a big office. She was a large, fat woman. He gave all his 2. ______ to his wife every Friday evening. She gave back some money which is ...
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