皮皮学，免费搜题
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【简答题】
Monologue (独白) 1. When will the group Red River leave London? A. On October 28th. B. On November 2nd C. On November 28th. 2. What is the telephone number? A. 238-0665 B. 283-6005. C. 283-0065. 3. How long does it take to get to the South Bank Hall? A. Thirty minutes. B. Forty minutes C. Fifty minutes. 4. What can we know from the monologue? A. Tickets are quite expensive. B. All of the money will go to a children's hospital. C. You can telephone to book tickets at 10:00 p.m.
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】人体血液平均每100ml中含19 mg K + , 则溶液中K + 的浓度为( )
A.
2.5 mmol·L -1
B.
4.9 mmol·L -1
C.
25 mmol·L -1
D.
49 mmol·L -1