轴报器出库前必须显示正常,轴与轴同侧温差不大于()℃。
A.2
B.5
C.10
D.12
参考答案:B
His heart racing, and tears ____ his eyes, Jack carefully unlocked the box.
A.filled
B.filling
C.to fill
D.being filled
研究性说课是指借助说课,评价教师的教学水平、认定等级、比较优劣为主要目的的一种说课形式。( )