洁净区的相对湿度为
A.45%~65%B.45%~75%C.20℃D.25℃E.30℃
参考答案:A
阅读填空 根据下面短文内容,在短文的空格处填上一个恰当的词.使短文完整、通顺。
Our eyes are very important to us. They are like cameras. We can see beautiful things and colors around us.
小题1: our eyes. But if we don't take care of them, they may
hurt. 小题2: do we protect our eyes?
On sunny days, the sun shines brightly. So we'd better
小题3: our sunglasses. When we read, we shouldn't stay
too close to our books and the light shouldn't be too bright 小题4: too dark. We mustn't read in bed. It’s 小题5: for our eyes. We mustn't rub our eyes with dirty hands or play games on computer too long.
央视《百战经典·伟大的会议》描述道:一个城市,因为一次重要会议与红色结缘;一座小楼,记录着中国革命的伟大转折;一次会议,从此改变了中国革命的历史进程。在这次会议上,中 * * 党()
A.提出了第一个彻底的反帝反封建的民主革命纲领
B.确定了建立抗日民族统一战线的方针
C.第一次独立自主地解决自己的路线方针和政策问题
D.实现了党的工作重心从农村到城市的转移