下列关于酶和ATP的叙述正确的是

设z₁是虚数，$z_2=z_1+\frac{1}{z_1}$是实数，且$-1\le z_2\le 1$，则z₁的实部取值范围是（ ）

用所给单词的适当形式填空。
1. I think Erin should tell her friend Anna not ____  (be) late for class again.
2. She always hes an ____  (argue) with her husband about money.
3. Children need some ____  (organize) activities.
4. You don't need to have too much ____ (press). Just try your best.
5. They are ____  (crazy) about dancing and singing.

切西瓜时，会流出一些汁液，这些汁液是从细胞的哪部分流出来的？(    )