进行水泥各项试验时工作环境是如何规定的？
参考答案：温度20±2℃，湿度大于50%。
You _______ to leave until you ________ your work. [ ]
A. won't be allowed; have finished
B. won't allow; finish
C. won't be allowed; will finish
D. won't allow; will finish
强度较小、持续时间较长的情绪状态是（）。
A、心境
B、激情
C、应激
D、情感
