对于夏季自然通风用的进风口，其下缘距离室内地面的高度不应大于()m。
A. 1.2
B. 1.0
C. 0.8
D. 0.6
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听力原文：W: I'm so excited that I can't sleep the whole night.
M: I'd be excited too if I had got such a good job as yours.
Q: Why was the woman excited？
(15)
A. She has got a driver's license.
B. She was accepted by a college.
C. She is going to another country.
D. She got a good job.
2007年三类教育招生人数比2003年增加了()。
A. 550万
B. 556
C. 34.2%
D. 33.7%
A．Two hours ago.B．Good luck.C．Happy journey.D．Tomorrow morning.
A. Two hours ago.
B. Good luck.
C. Happy journey.
D. Tomorrow morning.
以下推断正确的一项是()。
A. 人们对于细胞的研究已经很全面彻底
B. 人们已经利用胚胎干细胞治疗人类疾病
C. 人们能够利用造血干细胞治疗血液病
D. 干细胞不是所有分化细胞的始祖
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