皮皮学，免费搜题
登录
搜题
【单选题】
—I came to your office yesterday morning, but nobody was in. —Oh, we _____ a meeting in the meeting room. [ ]A.
have had
B.
had
C.
were having
D.
have
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
【单选题】听力原文：W: In America, many prisoners are having their cases reviewed, and some have even been freed through DNA testing. M: Then, how about the ones whose death sentence have already been carried out? Q...
A.
It has helped to find some criminals.
B.
It has found most criminals.
C.
It has freed all the innocent people from prison.
D.
It has freed some innocent people from prison.
【单选题】050604我国自行研制的歼 -20隐形战斗机的 关键部件采用了碳纤维材料.该材料具有比同体积 的常规材料轻、抗力本领强、耐腐蚀、抗电磁干扰能 力好等许多优点.下列说法中,不是碳纤维材料具 有的优点的是( )
A.
密度小
B.
强度大
C.
超导性
D.
抗腐强
【简答题】软磁材料的特点是磁滞回线较______，回线面积较______，磁导率较______，剩磁较______。常见低频软磁材料如______等，用于电机和变压器中的______；常见的高频软磁材料如______等，用于收音机中的______和______。
相关题目：
参考解析：
知识点：
题目纠错 0
发布
