我把自己对教材和试题的分析，写到这里吧
首先：从 Deep Learning By Ian Goodfellow, Yoshua Bengio, and Aaron Courville
松弛又拉满·
Scalars, Vectors, Matrices, and Tensors
**1. Identification**
* **Which of the following represents a Scalar?**
**2. Classification**
* **The object $\begin{bmatrix} 1 \\ 2 \end{bmatrix}$ is best classified as a:**