土是由()组成的物质。
A. 土粒
B. 土中水
C. 土中气
D. 孔隙
下列属于高能化合物的是
A. 乙酰CoA
B. ATP
CP
D. 磷酸烯醇式丙酮酸
It was a bloody ________ between the two armies.
A. rebellion
B. encounter
C. meet
D. fight
Students are asked to prepare material in advance of each weekly ________.
A. course
B. meeting
C. seminar
D. gathering