举一反三
- The atomic weight of an atom, or the molecular weight of a molecule, is its mass relative to that of a(n) ________ atom. This is essentially equal to the number of protons plus neutrons that the atom or molecule contains.
- Which one is a good way to set a password? A: Use your birth date B: Change it frequently C: Use the same password for every site
- To synthesize one molecule of cholesterol consumes 18 molecules of acetyl-CoA.
- The active pharmacodynamic conformation of flexible small molecules is generally A: Conformation in the lattice B: Conformation in a vacuum C: A local low energy conformation D: Solution conformation
- The function itself is called in the definition of a function. This is the recursive call of the function.
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Which of the following is the product of the ED pathway ( ). A: 1 molecule of ATP B: 1 molecule of NADPH + H C: 1 molecule of NADH + H D: 2 molecules of ethanol
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Which is not the feature of life? A: They have the ability to propagation. B: They have the active ability to change themself to adapt to the environment. C: They are mainly made up of carbon, hydrogen, oxygen, nitrogen, etc. D: They must have the ability to make and use tools
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A laser can be best described by______. A: a device for stimulating atoms and molecules to emit light B: an atom in a high energy state C: a technique for destroying atom or molecules D: an instrument for measuring light waves
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下列（）为聚合物。 A: monomer B: polymer C: molecule D: atom
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we use ( ) ,because it have search function and many Database.