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下列具有促进癌变的物质是( )。
下列具有促进癌变的物质是( )。
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2022-11-18
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题目：下列具有促进癌变的物质是( )。
A、 n-6多不饱和脂肪酸
B、 β-胡萝卜素
C、 硒
D、 碘
喵查答案：
A
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下列具有抑癌作用的物质是( )。
Some universities even require that all students own or (1)______ a laptop. Some say the focus on technology (2)______ students for a wired world. “You have to (3)______ the rest of the world. Students expect high-bandwidth information, and if you can’t (4)______ it, you’re at a (5)______ disadvantage,” states a university president. Other colleges are straining to stand out from their(6)______. The (7)______to attract students with the most modern networks and the hottest systems has reached fever pitch. Some business (8)______ are receiving free portable computers. In an always-connected mode, they can get information anytime and anywhere they need. One university is even giving its (9)______new smartphones to (10)______ the student experience and prepare them for success in a rapidly changing world.
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