Compost/ made/ from/ household/ garden waste.

A. Compost are made from household and garden waste.

B. Compost are made from household but garden waste.

C. Compost is made from household and garden waste.

D. Compost is made from household so garden waste.

Trong hợp chất sau đây có mấy liên kết peptit?

H 2 N − C H 2 − C O − N H − C H ( C H 3 ) − C O − N H − C H ( C 6 H 5 ) − C O − N H − C H 2 − C H 2 − C O O H

A. 1 

B. 3

C. 2

D. 4