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【简答题】
如图，△ABC中，AI、BI分别平分∠BAC、∠ABC．CE是△ABC的外角∠ACD的平分线， 交BI延长线于E，连接CI． （1）△ABC变化时，设∠BAC=2α．若用α表示∠BIC和∠E； （2）若AB=1，且△ABC与△ICE相似，求相应AC长．
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B.
全部是 D 型
C.
部分是 L -型,部分是 D -型
D.
除甘氨酸外都是L型
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A.
正确
B.
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【单选题】在参与人体蛋白质构成的 20 种氨基酸中,以下说法正确的是
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全部是 L －型
B.
全部是 D 型
C.
部分是 L －型，部分是 D －型
D.
除甘氨酸、脯氨酸外都是L- ɑ － 氨基酸
E.
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【单选题】A liferaft which has inflated bottom-up on the water ______.
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should be righted by standing on the carbon dioxide cylinder，holding the righting straps and leaning backwards
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should be righted by standing on the life line，holding the righting straps leaning backwards
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will right itself when the canopy tube inflates
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must be cleared of the buoyant equipment before it will right itself
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【单选题】Which of the following statements would be the best title of this passage?
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The Advantages of Boarding Schools.
C.
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D.
Give Your Kids a Good Education.
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【简答题】An old porter (搬运工人) had worked for the railway for a very long time. One morning he was standing in one of the big railway stations and waiting for travelers to ask him to help them with their luggag...
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【简答题】阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。 While I was standing at the kitchen window, five-year-old Spencer, my oldest son, ran into the house 1 , “We need a doctor out here! We need a doctor! Hu...
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相关题目：
【单选题】在参与人体蛋白质构成的 20 种氨基酸中,以下说法正确的是
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全部是 L -型
B.
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【简答题】阅读下面的短文，然后按照要求写一篇150词左右的英语短文。 The elephant and the fly An elephant was standing and picking leaves from a tree. A small fly came，flying and buzzing (嗡嗡叫) near his ear. The elephant waved it away with ...
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【判断题】构成蛋白质的氨基酸除甘氨酸外都是L-型氨基酸。
A.
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全部是 L －型
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E.
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查看完整题目与答案
【单选题】A liferaft which has inflated bottom-up on the water ______.
A.
should be righted by standing on the carbon dioxide cylinder，holding the righting straps and leaning backwards
B.
should be righted by standing on the life line，holding the righting straps leaning backwards
C.
will right itself when the canopy tube inflates
D.
must be cleared of the buoyant equipment before it will right itself
查看完整题目与答案
【单选题】Which of the following statements would be the best title of this passage?
A.
A Long-standing Educational Method.
B.
The Advantages of Boarding Schools.
C.
Find a Suitable School for Your Child.
D.
Give Your Kids a Good Education.
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查看完整题目与答案
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A.
Working harder to prove your value
B.
Standing up when negotiating on the phone
C.
Looking into your boss' eyes
D.
Keeping your hand still
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【判断题】如果两个矩阵都与同一个对角阵相似,则这两个矩阵相似
A.
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查看完整题目与答案