若裂纹深度小于壁厚的(),且不大于1毫米,可用砂轮把裂纹磨掉,并与金属表面圆滑过度即可。
A.25%
B.20%
C.15%
D.10%
参考答案:D
In Europe unemployment hit a new record with young people __________ it harder to get jobs.
A.to find
B.finding
C.having found
D.found
“支配着物质生产资料的阶级,同时也支配着()的资料”。