如图10-1-12中的左右两个电路都是从左端输入信号,从右端输出信号.左图中输入

题型:问答题

问题:

如图10-1-12中的左右两个电路都是从左端输入信号,从右端输出信号.左图中输入的是高频、低频混合的交流信号,要求只输出低频信号;右图中输入的是直流和低频交流的混合信号,要求只输出低频交流信号.那么C1C2中哪个该用大电容?哪个该用小电容?

图10-1-12

考点:交变电流的产生
题型:问答题

计算题:已知进入PSA单元中变气量为40000标立每小时,其中含氢量为80%,PSA单元产氢(99.9%)量为30000标立每小时,求氢回收率?

题型:问答题

关于止血带的使用方法正确的是()。

A.止血带应上在出血肢体的近心端

B.止血带的松紧程度以远端动脉搏动刚消失为准

C.用止血带常温下应控制在10小时内

D.应记录上止血带的日期及时间

题型:问答题

I used to find notes left in the collection basket of the church, beautiful notes about my homilies(讲道)and about the writer’s thoughts on the daily readings. The (1) fascinated me. But it was a long time (2) I met the author of the notes.

One Sunday morning, I was (3) that someone was waiting for me in the office, a young woman who said she (4) all the notes. When I saw her I was (5) , since I had no idea thatit was she who wrote the notes. She was sitting in a chair in the office. Her (6) was bowed and when she raised it to look at me, she could barely (7) without pain. Her face was disfigured(畸形), so smiling was very (8) for her. We (9) for a while that Sunday morning and agreed to meet for lunch later that week. As it (10) , we went to lunch several times, and we shared things about our (11) . We spoke of authors we both had (12) , and it was easy to tell that (13) are a great love of hers. She suffered from a disfigurement that cannot be made to look (14) . I know that her condition (15) her deeply. Yet there was a beauty to her that had nothing to do with (16) . She was one to be listened to, whose words came from a wounded but (17) heart. She possessed a fine tuned sense of beauty. Her only (18) in life was the loss of a friend. The truth of her life was a desire to see beyond the (19) for a glimpse of what it is that matters. She found beauty and (20) and they befriended her, and showed her what is real.

14().

A.friendly

B.happy

C.attractive

D.normal

题型:问答题

一箱可乐有24瓶,与箱子共重16公斤,卖掉5瓶后,剩下的可乐与箱子共重12.9公斤,那么箱子重多少克

A.1120
B.1200
C.1260
D.1350

题型:问答题

三化螟以幼虫蛀茎为害,形成枯心苗危害状的是在水稻()

A.分蘖期

B.苗期

C.孕穗期

D.抽穗期

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