单项选择题

第一节
听下面5段对话。每段对话后有一道小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。
听力原文：M: Well, I wonder why the office is still not open.
W: But it's not yet eight. In fact, it's only twenty to eight.
At what time does the office open?
A．7:45.
B．8:15.
C．8:00.

A.
W:
B.
At
C.7:45.
B．8:15.
C．8:00.

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单项选择题

听力原文：W: Good morning, sir. Could I ask you to check in please?
M: Of course.
W: Your name, please?
M: Gill Kemp.
W: OK. Your room number is 3126. Now, fill in the form, if you would, please, Mr. Kemp.
M: OK.
Where does the woman work?
A．At a bank.
B．At a hotel.
C．In a post office.

A.
W:
B.
W:
C.
M:
D.
Where
E.At
F.
B．At
G.
C．In
H.

多项选择题

下列哪项符合脐血中的造血干／祖细胞（）

A．CD34+细胞占有核细胞百分数的0．5％～1．5％
B．CD34+细胞占有核细胞百分数的0．05％～0．15％
C．CD34+细胞占有核细胞百分数的0．1％
D．CD34+细胞有12％～13％的细胞处在S／G2M期
E．脐血是造血干／祖细胞丰富的来源