Which molecule(s) make up the rails of the DNA ladder? Select all that apply.
A、Single nucleobase
B、Paired nucleobases
C、Sugar molecules
D、Phosphate molecules
A、Single nucleobase
B、Paired nucleobases
C、Sugar molecules
D、Phosphate molecules
88. We are determined to build our country into a prosperous and _______ socialist country.
|
A、free morpheme
B、root
C、inflectional affix
D、derivational affix
Task 4 Directions: Please fill in the following blanks to complete the contrastive analysis The former generation’s concept of love is characterized with 1) __________, which is the typical feature of the era of 2) __________, respect, admiration and romance. People used to be calm, shy, unpretentious and quiet with regard to the relation between man and woman. They tried to keep 3)_________ between sexes to preserve the 4) __________ of love relation. However, the younger 5) __________ seems to be 6) __________ in their love matters. They can hardly 7) __________ between physical attraction and mental 8) __________. Excessive 9) __________ to the media has made young people more adapted to fast pace in sensibilities, and to slow down the rhythm has become a challenge. Among young people, there is more closeness and less of 10) __________, more passion and less emotion, more acquiring and less sharing, more opportunism and less selflessness. It is a pity that love relation has degenerated to such an unserious state.
A、an increase in the price of cloth relative to that of food
B、an increase in the price of food relative to that of cloth
C、a decrease in the price of labor
D、an equal percentage increase in the price of food and cloth
A、Hybrid between phage and plasmid
B、Hybrid between M13 and lambda phage
C、Modified lambda vector
D、Modified M13 vector
A、M13
B、Lambda
C、2 micron circle
D、BAC
A、sodium dodecyl sulfate (SDS)
B、ammonium sulfate
C、ferric phosphate
D、phenol
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