施工作业必须纳入月度施工计划，应利用（）进行。
A、临时天窗
B、垂直天窗
C、施工天窗
D、维修天窗
参考答案：C
He managed to reach the summit of his career, but it was at the ________ of his health.
A．consumption
B．consequence
C．expense
D．evidence
竖毛肌
