影响汽提效率的因素有哪些?
参考答案:
温度、压力、氨碳比、水碳比、原料纯度、反应时间。
用户文档测试中不包括的是()
A、用户需求说明
B、操作指南
C、用户手册
D、随机帮助
He had lost his temper and his health in the war and never found()of them again.
A. neither
B. either
C. each
D. all