焊接再热裂纹的直接试验方法有斜Y形坡口焊接裂纹试验方法、()、平板对接刚板拘束法等。
参考答案:反面拘束焊道再热裂纹试验方法
请你写出一个至少含有加数是正整数且和为-8的等式______.
On the wall of his office _________the paintings of early French artists.
A.hanged
B.hanging
C.hang
D.are hanged