三相对称负载，每相阻抗为6＋j8Ω，接于线电压为380V的三相电源

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问题问答题简答题

三相对称负载，每相阻抗为6＋j8Ω，接于线电压为380V的三相电源上，试分别计算出三相负载Y接和Δ接时电路的总功率各为多少瓦？

答案

参考答案：

Y接I_l=22A

Δ接I_l=66A

填空题

短文填空 (首字母已给出)。

Dick was a clever boy, but his parents were very poor because b 1 of them were out of w 2 . So

he had to make money in his holidays. I 3 this way he was able to go on studying, but it was so expensive

there. S 4 he had to get two jobs. One summer he was lucky to get two jobs: one in a butcher's (肉铺) during

the daytime, the o 5 in a hospital at night. He must w 6 white clothes in these two places. One evening in

the hospital, Dick helped to carry a woman from her bed to the operating table (手术台). The woman was

a 7 of the operation before Dick came to get her. But when she saw him, she got even m 8 frightened.

She saw Dick c 9 meat in the butcher's before. "No! No!" s 10 cried. "I won't be operated on by a

butcher."

1. 2. 3. 4. 5.

6. 7. 8. 9. 10.

单项选择题

患者，女，26岁。产后20d， * * 胀痛，乳漏不止，要求回乳，用药宜选用

A．炒麦芽

B．炒谷芽

C．炒山楂

D．炒神曲

E．炒槟榔