A：①
B：①②
C：①②③
D：①②③④
阅读短文，从A，B，C，D四个选项中，选出可以填入空白处的最佳选项。
Zhang Zheng is my friend. He is a boy 1 Shanghai. He likes 2. He is in their school rock band. He often 3 the guitar on Sundays. He plays it very 4. You can see lots of 5 in his bedroom. In 6 you can see all kinds of guitars. Now their school rock band 7 two good musicians. Can you play the piano, the trumpet 8 the violin? Then you can join their band. You can 9 Zhang Zheng at 612-1251. You can also write to him. His 10 is zhangzheng2008@126.com.
实验桌上有一把钢尺，利用它能哪些物理实验？请写出其中一个实验名称和简单实验说明（除用该钢尺测量物体长度实验之外）
实验名称
简单实验说明
例：物体具有惯性
把尺子水平抛出去，尺子继续向前运动
（1）____
（2）____
下列方程的变形中，正确的是（ ）
“藕断丝连”是常见的现象，这里的“丝”属于植物体的输导组织？
