词汇与结构 This relationship between temperature, altitude, and air density can be expressed as a _______ altitude, or the altitude in the International Standard Atmosphere at which the air density would be equal to the actual air density.

Which of the following statements about density functional theory is not correct? A: B3LYP is a hybrid functional. B: TD-DFT can be used to calculate the properties of excited states. C: One can get a DFT molecular wavefunction from DFT calculation. D: For nondegenerate ground state, the wavefunction and all other molecular properties are uniquely determined by the ground-state electron probability density.

Dietary cholesterol that is absorbed in the small intestine is carried in the blood as part of: A: low density lipoproteins B: high density lipoproteins C: very low density lipoproteins D: chylomicrons

Dietary triglycerides that are absorbed in the small intestine are transported in the blood as part of: A: very low density lipoproteins B: chylomicrons C: low density lipoproteins D: high density lipoproteins

The density scale of atom is (    )

15. The _________ and density ... rewards the effort.

关键字密度（Keyword Density）

The factors affecting the lift of aircraft include angle of attack, air speed, airfoil shape and air density.

The main difference between the Earth's atmosphere and the simulated one is ______. A: their size. B: their content. C: their height. D: their density.

CT image not only shows its density with different gray scales , but also can be used to explain the difference of density degree with X-ray absorption coefficient , which has a quantity.