脊柱骨折病人急救运送方法正确的是（）

A.一人背负搬运

B.一人抱持搬运

C.二人抱持于硬板上搬运

D.二人平托于软担架上搬运

E.三人平托于硬板上搬运

用所给词的适当形式填空。

1. What do you think is the most______(help)invention?

2. Edison was a great            (invent). He had many______(invent) during his lifetime.

3. What______electric slippers            (use)for?

4. Personal computers              (invent) in 1976.

5. —What is the knife used for?

    —It's used for               (cut) things.