1274、预应力混凝土先张法构件中，混凝土预压前第一批预应力损失应为（）。

• A.<img src="https://timg.fentiku.com/javaimportItems/699bb583aa61424f8877b39dc0970d5b/images/381.png"><br/>
• B.<img src="https://timg.fentiku.com/javaimportItems/699bb583aa61424f8877b39dc0970d5b/images/838.png"><br/>
• C.<img src="https://timg.fentiku.com/javaimportItems/699bb583aa61424f8877b39dc0970d5b/images/dbe.png"><br/>
• D.<img src="https://timg.fentiku.com/javaimportItems/699bb583aa61424f8877b39dc0970d5b/images/13ca.png"><br/>

正确答案：C