2011届江苏省盐城市高三摸底考试数学卷

适用年级：高三
试卷号：642953

试卷类型：高考模拟
试卷考试时间：2017/7/19

1.选择题(共3题)

1.
The United Nations are evaluating the damage caused in Haiti earthquake, while in Chile the government itself ______ the lead role．

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2.
The United Nations are evaluating the damage caused in Haiti earthquake, while in Chile the government itself ______ the lead role．

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3.
The United Nations are evaluating the damage caused in Haiti earthquake, while in Chile the government itself ______ the lead role．

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执行如图算法框图，若输入

则输出的值为。

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已知四棱锥P—ABCD的底面为直角梯形，AB//DC，∠DAB=90°，PA⊥底面ABCD，且PA=AD=DC=1，AB=2，M是PB的中点。
（I）求AC与PB所成角的余弦值；
（II）求面AMC与面BMC所成二面角的余弦值的大小。

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试卷分析