A new building _______ the view of my office window.
A. takes
B. blocks
C. conceals
D. hides
The role will be the biggest ________ of his acting career.
A. challenge
B. examination
C. task
D. difficultly
视频中提到了哪些事物蕴含了吉祥(good fortune ,happiness,wealth）的含义
A. red color
B. dumplings
C. fish
D. lion
E. some kind of haircuts
F. white color
G. books
关于低碳钢试样拉伸至屈服时,有以下结论,请判断哪一个是正确的( )。
A. 应力和塑性变形很快增加,因而认为材料失效
B. 应力微小波动,塑性变形很快增加,但不意味着材料失效
C. 应力微小波动,塑性变形很快增加,因而认为材料失效
D. 应力和塑性变形虽然很快增加,但不意味着材料失效
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