电能向远距离用户区输送时,为了减少电能损失,应在发电厂将电能降压。(
参考答案:对
用所给动词的适当形式填空
1. Mozart __________(make) a lot of famous music.
2. His father __________(die) for five years.
3. There are many __________(music) playing the piano.
4. He __________(teach) us English well, doesn't he?
5. Please ask him __________(not watch) TV before he finishes his homework.
6. It's best __________(read) English in the morning.
7. If it __________(rain), my father __________(take) me to school in his car.
中年以上男性持续或间断咯血痰或少量咯血,最大可能是
A.肺炎B.肺脓肿C.肺气肿D.肺癌E.肺梗塞