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- 1在Rt△ABC中，∠C=90°，∠A、∠B的对边分别是a、b，且满足a2-ab-b2=0，则tanA等于（ ） A.1 B.1+52 C.1−52 D.1±52
- 2"I am the master of my fate; I am the captain of my soul." These are the words from a famous poet.
- 3We should bring help to those（）A,What B.who c.whose d.which
- 4My father likes ( ) fishing.It is his favourite hobby.A go B take C going D taking
- 5赞美母爱的诗句或成语,越多越好!
- 6已知一个比例的两个外项分别是3和1/4，组成比例的两个比的比值是1/2，这个比例是_．
- 7She wants to practice (speak) English.用speak的适当形式填空
- 8王老师用100元去买了20支圆珠笔和10支钢笔，每支钢笔的价钱和每支圆珠笔的价钱的比是3：1．问买圆珠笔和钢笔各花了多少元？
- 9小学数学应用题解答一批苹果有830框,小货车每次可运20框,运费150元,拖拉机每次可运15框,运费120元,你
- 10如图，AB是⊙O的直径，点D、E是半圆的三等分点，AE、BD的延长线交于点C，若CE=2，则图中阴影部分的面积是（ ） A.43π-3 B.23π C.23π-3 D.13π