Mobile phones or cell phones are usually used for public purposes.（）

Mobile phones or cell phones are usually used for public purposes.

Mobile phones or cell phones are usually used for public purposes.()

peptides and most amino acids are actively transported into cell by a sodium co-transport strategy.

Point-by-Point Pattern is often used in the short essay with many aspects and a long essay with few aspects.

The backbone of cell membrane is made up of .

Themore expensive our gift is, the more respect we show to the gift-recipient.()

When you finish, you should cross the knife and fork.()

If the fork and the knife are placedparallel to each other, it means you’ve finished eating.()