皮皮学，免费搜题
登录
搜题
【简答题】
变流技术是电力电子技术的核心，其中，改变电压和频率，将交流电变为固定的或可调的直流电的变流器叫 器。改变电压和频率，实现直流对交流变换功能的变流器叫 器。当输出接电网时，称之为 器。当输出接无源负载时，称之为 器。改变电压和频率，实现将交流电到交流的变换功能的变流器叫 器。改变电压幅值得大小，实现直流对交流变换功能的变流器叫 器。 A. B. C. D. E. F.
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】Although the colonists ________ to some extent with the Native Americans, the Indians’ influence on American culture and language was not extensive. A) migrated B) matched C) mingled D) melted
【单选题】I agree with him ______, but not entirely.
A.
until a certain point
B.
to some point
C.
to some extent
D.
until a certain extent
【简答题】Every aspect of Viking culture was to some extent influenced by ships, including ______.
【简答题】万用表可以测量哪些
【单选题】This will ______ pressure on the trains to some extent.
A.
relieve
B.
release
C.
resort
D.
reform
【单选题】Though dress may be, ______ some extent, helpful in judging a person, that alone will not be sufficient.
A.
for
B.
to
C.
in
D.
by
相关题目：
参考解析：
知识点：
题目纠错 0
发布
