鼻真菌病最常见的发病部位是()。
A.额窦
B.上颌窦
C.额筛隐窝
D.中鼻道
E.蝶窦
参考答案:B
解析:真菌性鼻-鼻窦炎常为单窦起病,以上颌窦发病率最高。
WebSQL is a SQL-like ___(71)___ language for extracting information from the web. Its capabilities for performing navigation of web ___(72)___ make it a useful tool for automating several web-related tasks that require the systematic processing of either all the links in a ___(73)___ , all the pages that can be reached from a given URL through ___(74)___ that match a pattern, or a combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common ___(75)___ Interface.
A.paths
B.chips
C. tools
D.directories
在采用需要系数法计算负荷时,求得自然功率因数为0.7,总的有功计算负荷为 750kW,要求安装无功功率补偿电容器将功率因数补偿到0.9,则电容器补偿容量的计算值约为( )。
A.300kvar
B.400kvar
C.500kvar
D.600kvar