用小学知识讲解这道题---``` **Extraction Content:** **Topic/Context:** 空间观念 (Spatial Concept) **Question Number:** 4. **Question Stem:** 从下面 5 组积木中选取 3 组积木可以拼成下面的正方体, 正确的是 ( )。 (100) *(Translation: Select 3 groups of building blocks from the following 5 groups of building blocks to assemble the cube below. Which is correct ( )?)* **Chart/Diagram Description:** * **Type:** Isometric projection diagrams of 3D shapes made of unit cubes. * **Main Elements:** * **Target Shape:** A large cube is shown at the top. It is depicted as a 3x3x3 arrangement of smaller unit cubes, totaling 27 unit cubes. Grid lines are visible on the exterior surfaces, outlining the individual unit cubes. * **Building Block Shapes:** Five distinct shapes, composed of connected unit cubes, are shown below the target shape. They are labeled with circled numbers ①, ②, ③, ④, and ⑤. * **Shape ①:** A structure appearing to be made of 5 unit cubes. It resembles a 1x3 base with two additional cubes stacked on one end, or a 2x2 base with one corner missing and one cube on top of one of the remaining cubes. * **Shape ②:** A rectangular block appearing to be a 2 units high by 3 units wide structure, made of 6 unit cubes. * **Shape ③:** A structure appearing to be made of 6 unit cubes. It has a base that extends 3 units in one direction and 2 units in another (L-like), with varying heights. * **Shape ④:** A structure appearing to be made of 5 unit cubes. It resembles a 1x3 base with two additional cubes stacked on one end. * **Shape ⑤:** A structure appearing to be made of 6 unit cubes. It has an L-shaped base with additional cubes stacked above. **Options:** A. ①②③ B. ①③④ C. ②③⑤ D. ③④⑤ **Other Relevant Text:** (100) appears inside the parentheses next to the question stem, likely indicating the score or question identifier. ```