【判断题】均质方法一般采用二段式,第一段均质使用较高压力(16.7~20.6 MPa),目的是分散已破碎的小脂肪球,防止粘连。
【多选题】下列关于地方性氟中毒的区域分布,叙述正确的有
B.
经济发达地区地方性氟中毒的患病率低,病情较轻
C.
经济发达地区地方性氟中毒的患病率低,但病情较重
D.
经济不发达地区地方性氟中毒的患病率较高,病情较重
E.
pH值高,气温炎热而用水量大的地区,其患病率较高
【单选题】下列哪种关于地方性氟中毒流行特征的论述是错误的
【简答题】In many parts of the world, cars play an important role in daily life and many societies would not exist without them. 1 But this is the prediction made by a team of transport researchers who are take...
【单选题】In many parts of the world cars play an essential role in daily life and many societies would cease to function without them. So, tile claim that in 20 years' time, no one will own cars may be hard to...
A.
don't believe the prediction that nobody will own cars by 2020
B.
are devoted to the technological innovation in car industry
C.
consider the predictions made by the researchers seriously
D.
have put the super-intelligent car into mass production
【判断题】交流发电机的定子绕组通常采用三角形联结,整流器为二极管整流法。
【单选题】关于疾病的地方性的说法,下列说法不正确的是( )
E.
迁出该地区的居民,该病的发病率下降,患者症状减轻或呈自愈趋向。
【单选题】下面关于地方性氟中毒人群分布描述正确的是()
【判断题】均质方法一般采用二段式,第一段均质使用较高压力(16.7~20.6 MPa),目的是分散已破碎的小脂肪球,防止粘连。