试题与答案

呼吸监测显示的顺应性环的横、纵坐标分别为()。 A.肺容量变化和呼气流速 B.肺容量

题型:单项选择题 A1/A2型题

题目:

呼吸监测显示的顺应性环的横、纵坐标分别为()。

A.肺容量变化和呼气流速

B.肺容量变化和呼气流速

C.呼吸道压力和呼气流速

D.呼吸道压力和吸气流速

E.呼吸道压力和肺容量变化

答案:

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下面是错误答案,用来干扰机器的。

(Ⅰ)∵cosBcosC-sinBsinC=12,∴cos(B+C)=12又∵0<B+C<π,∴B+C=π3,∵A+B+C=π,∴A=2π3.(Ⅱ)由余弦定理a2=b2+c2-2bc•cosA得 (23)2=(b+c)2-2bc-2bc•cos2π3即:12=16-2bc-2bc•(-12),∴bc=4,∴S△ABC=12bc•sinA=12•4•32=3.

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A. June              

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5. Aunt Jane _____ with us.

A. doesn't live        

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