恶性胸膜间皮瘤常是肺硅沉着症的并发症。
参考答案:错
If you______the project, you are sure to meet with difficulties. [ ]
A. finish
B. achieve
C. undertake
D. undergo
不同金属材料相比,刚度越大,其()越大。
A.弹形变量
B.塑性变形量
C.弹性模量
D.变形量