皮皮学，免费搜题
登录
搜题
【判断题】
压力容器和管道水压试验用的水温，低碳钢和16MnR钢不低于15℃。()A.
正确
B.
错误
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：M: Jeff has not been on good terms with his sister for the last few years, but I hear he visited her on his trip to California recently. W: Yes, he hadn't planned to call on her, but he changed h...
A.
Jeff has always liked his sister.
B.
Jeff made a phone call to-his sister.
C.
Jeff visited his sister.
D.
Jeff planned to visit his sister.
【简答题】电路如图14．35所示。开关S闭合前电路已达稳态。t=0时闭合开关S，用拉普拉斯变换法求电压uc(t)。
【简答题】电路如图所示。t＜0时电路处于稳态，t=0时开关S闭合。求S闭合后的电压u(t)。
【单选题】Sam has curly hair but his twin sister’s is quite ().
A.
even
B.
straight
C.
uneven
D.
regular
【单选题】His sister _____ to the hospital. She will be back _____ half an hour. [ ]
A.
has gone; after
B.
has been; in
C.
has gone; in
D.
has been; after
相关题目：
参考解析：
知识点：
题目纠错 0
发布
