点M、N分别是正八边形相邻的边AB、BC上的点,且AM=BN,点O是正八边形的中心,则∠MON=( )度。
45°
照句中画线部分的结构将给出的汉语译成英语。
仿1. I wonder if it's because I haven't been able to be outdoors for so long that I've grown so crazy
about everything to do with nature.
是因为他犯了很多次同样的错误老板才辞退他的.
________________________________the boss fired him.
2. It's no pleasure looking through these any longer because nature is one thing that really must
be experienced.
汤姆已决定离开这城市.和他谈论这些事情没用.
Tom has decided to leave the city.___________about these things.
3. It was the first time in a year and a half that I'd seen the night face to face.
这是简第一次参观北京.
________Jane_________Beijing.
4. I don't want to set down a series of facts as most people do.
在警察来之前,我们最好让现场保持原样.
We'd better leave scenes____until the police arrive.
5. She found it difficult to settle and calm down in the hiding place.
我发现通过想象的方式来记忆单词很容易.
I________remember words in the way of imagination.
可设置置换通风的情况不包括()
A.有热源或热源与污染源伴生
B.人员活动区空气质量要求不严格
C.房间高度不小于2.4m
D.建筑、工艺及装修条件许可且技术经济比较合理