以高压甚至超高压将发电厂、变电所或变电所之间连接起来的送电网络称为（）。
参考答案：输电网
注射局麻药后同侧颊部随即出现肿胀，这是发生了
A．水肿
B．气肿
C．血肿
D．感染
E．嚼肌痉挛
According to the school rules, if a student _________ happen to damage something by accident,he/she should report it to a teacher or the office immediately.
A．should
B．will
C．shall
D．would
