5. What limitations are mentioned that could affect the results of the study?

There may be a difference between dog owners and non-owners that existed before the dog was obtained. It’s also possible that people who tend to buy dogs are also generally more active.

2. 请在不参考课文的情况下完成下列练习。选择一个意思合适的单词填入句子的空格处。

1. That dog doesn’t have an owner so come away immediately. Can’t you see it’s a stray? It might have a disease.

2. Quickly, nurse. He’s going into cardiac arrest. Get me the defibrillator.

3. He won’t bite, but he doesn’t like being touched. It’s down to his last owner, who used to beat him.

4. How can you not see it? There’s a marked difference between the first picture and the second!!

5. Please stop smoking, son. It goes hand-in-hand with cancer and you don’t want that.

【The dogs who safeguard our hearts 养狗能保护我们的心脏健康】相关文章：

★ Why do we laugh? 为什么我们会笑？

★ How safe is your bed? 你的床安全吗？

★ The future of English 未来的英语语言变化

★ In one ear and out the other 左耳进，右耳出

★ The mystery of our earliest memories 人类早期记忆的谜团

★ Heathrow expansion and dog lifeguard training 希思罗机场扩建, 救生犬的训练

★ 语法：英语量词

★ There's method to my madness 我有一个不合常理的办法

★ 日常英语：手机用语

★ Table, diagram, graph and chart 表示“图表”的四个英语单词