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【单选题】
抗UVPC 2.抗UVCR-39 3.皇冠玻璃 4.PC 5.CR-39 抗紫外线能力排序正确的是()
A.
2＞1＞5＞4＞3
B.
1＞2＞5＞4＞3
C.
2＞1＞5＞3＞4
D.
5＞1＞2＞4＞3
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参考解析：
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【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