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【单选题】
伽德罗常数约为6.02×10 23 mol -1 ，下列叙述中正确的是A.
将含有NO 2 和N 2 O 4 分子数共约6.02×10 23 个的混合气体温度降至标准状况时，其体积约为22.4L
B.
在1 L 1 mol·L -1 的氨水中，含有的NH 3 与NH 3 ·H 2 O分子的总数小于6.02×10 23 个
C.
标准状况下，等体积的HF、HCHO、CH 3 Cl 、SO 3 原子数之比为2：4：5：4
D.
1 mol S和足量的铜粉反应，转移电子数目约为6.02×10 23 个
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皮皮学刷刷变学霸
举一反三
【单选题】下列关于铁剂治疗缺铁性贫血的注意事项中哪项是错误的（）
A.
服用铁剂时忌喝浓茶
B.
与维生素C合用，促进铁的吸收
C.
应从小量开始
D.
忌与四环素类药物同服
E.
与碳酸氢钠同服，以减轻铁剂对胃的刺激
【简答题】you I owe a thousand apologies havingdoubted your ability. A. Forto B. To for C. Forfor D. To to
【单选题】7岁儿童，发热、头痛、恶心呕吐2天，嗜睡1天，查体：体温5℃，浅昏迷，瞳孑L等大，对光反应良，颈强(+)，克氏征(+)，胸腹部多个出血点，化验：WBCl9×109／L.N 85%.，最可能的诊断为
A.
结核性脑膜炎
B.
流行性脑脊髓膜炎
C.
流行性乙型脑炎
D.
流行性出血热
E.
中毒性细菌性痢疾
【单选题】听力原文：W: Hello, Mr. Kay? I'm sorry for being late. M: That's quite all right. W: I owe you an apology. I was planning to come to your reception this evening but I'm afraid I can't make it after all. My...
A.
She is ill.
B.
We don't know from the passage.
C.
There is something wrong with her father.
D.
She went to see a doctor.
【单选题】Do parents owe their children anything? Yes, they owe them a great deal. (69) One of their chief duties is to give their children a sense of personal worth, for self-esteem is the basis of a good ment...
A.
privacy
B.
cars
C.
respect of self
D.
information about their body
【判断题】I can see that you owe 25 cents a day. That will be one dollar and fifty cents total.Owe means "欠".
A.
正确
B.
错误
【单选题】5岁儿童，发热、头痛、恶心呕吐2天，嗜睡1天。查体：体温39.5°，浅昏迷，瞳孔等大，对光反应良，颈强(+)，克氏征(+)，胸腹部多个出血点。化验：WBC19×109/L，N85%，最可能的诊断是
A.
结核性脑膜炎
B.
流行性脑脊髓膜炎
C.
流行性乙型脑炎
D.
流行性出血热
E.
中毒性细菌性痢疾
【单选题】--- I’m a student from Grade One. I want to become the ______ of the Music Club. --- Welcome! But you have to sing well.
A.
problem
B.
sign
C.
friend
D.
member
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