下面的Ruby代码:rx = {:fox=>/^arm/, 'fox'=>[%r{AN(DO)$}, /an(do)/i]}下面哪个表达式可以求值为非空？ A: "armando" =~ rx{:fox} B: rx[:fox][1] =~ "ARMANDO" C: rx['fox'][1] =~ "ARMANDO" D: "armando" =~ rx['fox', 1]

fox

There are many (fox) in the picture.

Here is a picture of Fox’s family. This is Fox’s father, Mr. Green. And this is Fox’s mother, Mrs. Green. Look at that boy. He is Fox’s brother, Katy. They are all under an orange tree. Fox looks like his mother and Katy looks like his mother, too. Fox is in No. 2 Middle School. He is twelve. His brother is fourteen. The families are Americans. What does his father do A: A worker. B: A teacher. C: I don’t know.

Why did the fox think for a while before answering the sheep A: [A] He wanted the sheep to enjoy some water too. B: He wanted the sheep to stay in the river together with him. C: He wanted to think of an idea to make the sheep help him out.

It was winter. A fox was very hungry, but he didn’t worry about it. He was sure that he could find food. He saw a truck (卡车) and there was a big box full of fish in the truck. He lied down and played dead. When the driver saw the dead fox, he stopped. He put the fox into the truck and went on driving. The fox quickly ate the fish and ran away. The fox is dead.

How did the fox come out of the well? A: He jumped to the mouth of the well from the goat's back. B: He came out by pulling the horn of the goat. C: He climbed to the mouth of the well by himself. D: He swam out of the well when the water was rising.

The best irrigation water is river water, pond water and lake water A: 正确 B: 错误

What water is used in the production of injection A: pure water B: purified water C: water for injection D: sterile water for injection

According to the distribution of oil, gas and water, the water at the edge of containing edge is called (). A: External water B: Bottom water C: Edge water D: Edge bottom water