Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questi

ons from 46 to 64.The United States consists of fifty states, _________ has its own government

A. each of them 

B. each of which 

C. they each 

D. each they

Sản phẩm đầu tiên của chu trình Canvin là chất nào sau đây?

A. ATP, NADPH

B. APG (axit phôtphoglixêric).

C. ALPG (anđêhit phôtphoglixêric).

D. RiDP (ribulôzơ – 1,5-điphôtphat).