可控硅是可控整流器、逆变换流器、无触点交流开关的主要器件,具有()、()、无电火花等优点。
参考答案:调节方便;开断迅速。
.Nobody knew when the fire ________, but they knew it ________ the next morning.
A.broke out; was put out
B.was broken out; was put out
C.broke out; put out
D.was broken out ; wwent out
中国古代文论中对文学文本的简分法将文学文本划分为()
A、文和笔
B、文和赋
C、笔和散
D、诗和赋