负反馈多用于()。A.改善放大器的性能 B.产生振荡 C.提高输出电压

题型:单项选择题

问题:

负反馈多用于()。

A.改善放大器的性能

B.产生振荡

C.提高输出电压

考点:电子与通信技术电子技术电子技术题库
题型:单项选择题

根据短文内容及首字母提示,填写所缺单词,将答案按序号填入下面表格内。

    Stephen is a boy from the USA. He lives in a large house near the beach. The balcony is his f   1    place

because he can play games, read comics and c   2    with her friends there, Madee lives in Thailand. She lives

with his big family i   3    a wooden house. She is the s   4    child of the family. Her hometown is a beautiful and

q   5    place. Many people go on a t   6    there every year, Neil lives in a small house in a town near London,

His favorite place is the k   7   , where his mum often makes delicious food. Neil and his family always watch

TV in the sitting room. His dog likes s   8    in the garden, Anna lives with his family in a flat on a busy street.

Her room is not big. So she has to s   9    a bedroom with her sister . Anna's n  10    are very kind. So she is

very happy to live there.

1.                2.                 3.                 4.                  5.                  

6.                7.                 8.                 9.                  10.              

题型:单项选择题

卫生费用核算基本概念。

题型:单项选择题

下列属于银监会的监管理念的是()

A.管风险

B.提高透明度

C.管机构

D.管法人

E、管内控

题型:单项选择题

下图为岩石圈物质循环示意图,图中Ⅰ、Ⅱ、Ⅲ分别代表沉积环境、熔融环境和变质环境,箭头线代表不同的地质过程。读图回答下面问题。

 

古生物进入并成为岩石中化石的地质环境和过程是()

A.Ⅰ——①

B.Ⅱ——③

C.Ⅲ——⑤

D.⑥——Ⅰ

题型:单项选择题

发展力量素质的方法是()

A、杠铃半蹲跳

B、越野跑

C、钻过低栏架

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