突起路标样品经过耐候性能试验后，应从表面外观、光度性能、色度性能三方面来判断样品的耐候性能。
参考答案：对
The computer system ______ suddenly while he was searching for information on the Internet. [ ]
A. broke down
B. broke out
C. broke up
D. broke in
具有"主运化"功能的脏是（）
A.肝
B.心
C.脾
D.肺
E.肾
