1, known: As shown in the figure, in △ABC, ∠ ade = ∠ c, then the following equation holds.

A.eq \f(AD，AB)= eq \f(AE，AC) B. eq \f(AE，BC)= eq \f(AD，BD) C. eq \f(DE，BC)= eq \f(AE，AB) D. eq \f(DE，BC)= eq \f(AD，AB)

2.AC is the diagonal of □ABCD, so similar triangles in the figure have ().

A.2 right; B.3 rights; C.4 right; D.5 right.

3. If the solution of the equation x 2m-3 = 3x 7 about x is a non-negative number not greater than 2, then

(a) m = 6 (b) m = 5,6,7 (c) No solution (D)5≤m≤7.

4. As shown in the figure, P is the golden point of line segment AB (Pb > Pa), quadrilateral AMNB and quadrilateral PBFE are both squares, quadrilateral APHM and quadrilateral APEQ are both rectangles, and the areas are respectively. The following statement is correct.

A.= B. = C. = D. =

5. Plato said the following sentence through the mouth of Timaeus of Pythagoras School: "Two things cannot be perfectly combined unless there is another third party in the middle, because there must be a combination between them, and the best combination is proportion. There are three quantities. If the ratio of median to decimal is equal to the ratio of large number to median, conversely, the ratio of decimal to median is equal to median.