硝苯地平用于高血压的治疗时常见踝部水肿,其原因主要是()
A.血浆晶体渗透压降低
B.血浆胶体渗透压降低
C.水钠潴留
D.尿量减少
E.毛细血管扩张
参考答案:E
按要求改写下列句子。
1. The girl is singing in her room.(改为一般疑问句)
the girl in her room ?
2. There are two books in my hand ?(对划线部分提问)
books are there in your hand ?
3. They have sports at school every day.(改为否定句)
They sports at school every day.
4. I can see some pictures on the wall.(改为一般疑问句)
see any pictures on the wall ?
5. There are some new CDs on the desk.(改为否定句)
There new CDs on the desk.
将由模拟信号变成数字信号的装置叫做D/A转换器。