Genetic information can be carried in which of the following biomolecules（）
A. Either DNA or RNA
B. Proteins
C. DNA and not RNA
D. RNA and not DNA
查看答案
—-do you visit your grandparents？ Once a week（）
A. How long
B. How soon
C. How often
D. How many
Help yourself to —–（）
A. chickens and apples
B. chicken and apple
C. chickens and apple
D. chicken and apples
These children are—- this year than they were last year（）
A. more tall
B. more taller
C. very taller
D. much taller
Only by calling them every hour of the day _____ to get what I wanted（）
A. did I manage
B. I managed
C. had I managed
D. I had managed
微信支付 
支付宝支付