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【单选题】
( )使用一种冷光源,工作时无温升,不产生热量,不含紫外线;发光效率高,功耗极低,非常省电,而且发光颜色丰富,可通过闪动达到复杂的动画效果。
A.
灯片海报
B.
LED灯带
C.
EVA
D.
及时贴
举报
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Space is a dangerous place, not only because of meteors (流星) but also because of rays from the sun and other stars. The atmosphere again acts (67) our protective blanket on (68) . Light gets through, ...
A.
from
B.
than
C.
as
D.
away