问题
选择题
All the students are looking forward to the first _____ to take the College Entrance Examinations.[ ]
A. measure
B. attempt
C. purpose
D. desire
答案
答案：B
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All the students are looking forward to the first _____ to take the College Entrance Examinations.[ ]
A. measure
B. attempt
C. purpose
D. desire
答案：B
C(g)+D(g)，当下列物理量不发生变化时，能表明该反应已达到平衡状态的是( )