承重结构用的木材，若构件受拉或受拉弯，采用木材的材质宜为()。

• A.<img src="https://timg.fentiku.com/img/2018-04-09/5acad7df0f0c0.png" alt="" />
• B.<img src="https://timg.fentiku.com/img/2018-04-09/5acad7e8c02f5.png" alt="" />
• C.<img src="https://timg.fentiku.com/img/2018-04-09/5acad7f01042d.png" alt="" />
• D.<img src="https://timg.fentiku.com/img/2018-04-09/5acad7f58d950.png" alt="" />

正确答案：A