晶胚的临界半径rk随着ΔT的增大而减小,相变愈易进行。
参考答案:对
_______ passion, people won't have the motivation or the joy necessary for creative thinking. [ ]
A. For
B. Without
C. Beneath
D. By
步行上下班时,区间应在()或路旁走行。
A、道心
B、路肩
C、路肩外
D、钢轨外头