Question

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如图，在直角三角形ABC中，角ABC=90度，AB=7．将三角形ABC沿着AC翻折得到三角形APC，过点A座 AD平行于BC，交线段CP于点D，记三角形APD面积为S1，三角形ADC面积为S2，且S1/S2=3/4，则BC的值为多少。

Answer 1

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Answer 2

1.older 2.younger 3.thinner 4.bigger 5.higher 6.better 7.bigger 8.heavier 9.earlier 10.earlier, don't 11.slowly, slower 注意动词后面要借副词，所以11题的第一个空是slowly 这些很简单“比较级”练习 ，LZ要好好学习哦

Answer 3

This design is a chemical process according to the production requirements, need to work with steam pressure and 0.6 MPa for 0.9 MPa saturated steam, two steam content of 0.6 t/t/h h, 5.35. Because of project area at present, there is no heating planning, to meet production requirement, we need new steam heating boiler to meet a