The amount-of-substance concentration may be referred to as the concentration for short.

content ( <br/>) A: to move back and<br/>forth or up and down with quick motions. B: to bring a past<br/>event into the mind; remember. C: the fact or<br/>state of being possible. D: the amount of a<br/>substance that is contained in something else.

The passage implies that cellulose is a very porous substance because it contains______. A．a substance that creates pressure B．millions of tiny holes C．a substance that dissolves it D．liquid medicine

The physical properties are those properties of a substance that can be observed with changing the substance into other substances.

Plasma clearance is referred to Renal clearance of a substance is the volume of plasma that is completely cleared of the substance by the kidneys per ______ .

Which of the following () may not be interested in science and technology A: The substance facing a resource shortage B: The substance with an increasing uses C: The substance whose anthropogenic flow is closely related to other substances D: None of the above

niece ( <br/>) A: the cutting side<br/>of a knife blade or other sharp tool. B: a daughter of<br/>one's brother or sister; a daughter of one's brother-in-law or<br/>sister-in-law. C: the amount of a<br/>substance that is contained in something else. D: to cut or pierce<br/>with the teeth.

substance的词性是:

We<br/>can get a new substance if we _____ a chemical substance with others. A: incorporate B: insert C: obtain D: deprive

Fuel is (any) substance or material (that reacts) chemically (with) another substance or material to produce (hot). A: any B: that reacts C: with D: hot