1. Error 2. Error 3. Error 4. Right 5. That's right.

two

1. Early childhood and adolescence 2. Cardiac output, vital capacity, secondary sexual characteristics 3. March 12 4. Hepatitis a and hepatitis b. Chest and waist areas.

three

1.A 2。 B 3。 D 4。 C 5。 A

four

Learning to arrange the study time reasonably will greatly improve the study efficiency.

We should make full use of the study time during the day, because during the day we are in a good mental state, have a strong memory and are active in thinking. Before class every day, you should make a simple study plan in your mind and set yourself a small goal to prevent aimless lectures.

Pay attention to the "combination of work and rest" in study. Take proper exercise, entertainment or rest.