水泵安装质量应满足如下基本要求:①稳定性,②整体性,③(),④对中与整平。A.水泵性 发布时间:2017-07-25 05:29 │ 来源:www.tikuol.com 题型:单项选择题 问题: 水泵安装质量应满足如下基本要求:①稳定性,②整体性,③(),④对中与整平。A.水泵性能要稳定 B.电机电压应满足要求 C.机组尺寸应符合要求 D.位置与标高要准确
题型:单项选择题 选择正确的单词填空。How library cold have going January fly shopping1. Let's go to the park to _____________ kites. 2. Let's go to the _____________ to read a book. 3. _____________ is the weather? It's hot. 4. Where are you _____________? 5. How is the weather in _____________? 6. The weather is _____________. 7. I want to _____________ some ice cream. 8. I want to go _____________. 查看答案
题型:单项选择题 在“观察水的沸腾”实验课上,两组同学记录如下表:加热时间/min012345678甲组水温/℃85889092.595.597989898乙组水温/℃8689.59293.596.598.598.598.598.5(1)由上表可知:甲组水沸腾时的温度为______℃,乙组的水在第______min开始沸腾.(2)由实验可知,水在沸腾时,吸收热量,温度______.(选填“升高”、“不变”或“降低”)(3)甲、乙两组测出水沸腾时的温度都小于100℃,这是因为当时的大气压______1标准大气压,甲、乙两组测出的沸点不同,这是因为实验存在______. 查看答案