阅读理解。

1. What don't you need when you cook Almond Fried Rice?

A. 4 eggs.

B. 1 large crab.

C. 1 teaspoon of salt.

D. Chopped onions.

2. What is the first thing you do with the crab?

A. Clean it.

B. Cook it.

C. Cut it up.

D. Serve it.

3. How many steps do you need to cook Almond Fried Rice?

A. One.

B. Two.

C. Three.

D. Four.

串联电路的电阻越多，总电阻的阻值越小，并小于各串联电阻中的任何一个电阻。