机组启动过程中，当主再热汽温在10min内上升或下降（）℃时应立即停机。
参考答案：50
—My daughter has passed the exam.
—Congratulations! She’s really intelligent.
— .
A．No, she is nothing
B．Oh, thank you!
C．Sometimes she is intelligent
D．You are right
钟表的指针恰好是10点整，此时，钟表上时针与分针所夹的锐角的度数为______．
