题目内容

设X服从参数为λ的泊松分布，且E(X2+2X-4)=0，则P(X≥1)=______．

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Read the following tongue twisters. Better to know everything of something than something of everything.

Is there a ______ between smoking and lung disease (nick, link)

结核病具有诊断意义的病理改变是

A. 坏死性肉芽肿
B. 巨噬细胞增生
C. 结核结节
D. 纤维组织增生
E. 钙化

Fill in the blanks with the given words in the brackets. After listening, imitate reading all the sentences. That violin has a beautiful ______. (tone, ton)