交流滤波的优点是负载直流电压较高,纹波较小,输入特性好。()
参考答案:错
根据句意及首字母提示写出所缺单词。
1. Tina recently won an award from the Help Our Planet S____.
2. Tom spends most of his s____ time reading.
3.--What's the w____ of the apples?
--Let me see. They're 2 kilos.
4. S__________ endangered animals is one thing we can do for our world.
5. --How do you feel when you see the national flag of China?
--It makes me feel excited and p____.
某男,25岁,因贪凉露宿,醒后大便清稀如水,脘闷食少,腹痛肠鸣,伴恶寒发热,头痛,肢体酸楚,苔薄白而腻,脉濡缓。
若无表证而腹满肠鸣,泄泻重,小便不利,则应()
A.加平胃散
B.加二陈汤
C.加滑石、车前子
D.改用胃苓汤
E.改用葛根芩连汤