阳光中有一种看不见的光线，叫红外线，具有杀菌作用，可以杀灭很多种细菌，包括“结核”“伤寒”“痢疾”等疾病的病原菌．阳光越强，暴晒时间越久，杀菌效果越好．______．
阳光中含有红外线与紫外线．红外线可以蒸发水分，让细菌脱水而死．紫外线可以使细胞核浓缩，而在细胞浆产生空泡，使细菌死亡． 红外线与紫外线虽然可以杀细菌，但也会杀死人类的细胞，所以也不要暴露在阳光太久．
故答案为：×．
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| Every morning, Anne Ravenscroft gently wakes her daughter Heidi so that she can wash and dress her ready to start the day. Later, as she continues to 1 Heidi, Anne chats about the weather, the birds and other things. All day long, Anne is there to wait on her daughter's every 2 . But Anne is no new mother 3 her baby: she is 81 and a grandmother. Her 46-year-old daughter is so 4 that she can't speak, walk or do anything without the help of her 5 . Heidi has a neurological (神经病学的) condition called Rett Syndrome, which has left her unable to 6 . Ever since she was born, her main 7 has been her mum, Anne. For 46 years, Anne has thrown herself into this 8 role, and she goes on to 9 her daughter's every need. It is for this 10 that Anne has been crowned (为…加冕) winner of the Daily Mail Carer of the Year awards. She was 11 because of her patience and kindness, 12 which she continues to carry out this role. Anne remembers:"It was 13 shocking when Heidi was diagnosed (诊断), especially to know there was nothing we could do to 14 her. But Anne never looked for 15 or reward; she just cared for her daughter. Anne admits that her relationship with Heidi is 16 . "I'm very touched that other people have seen 17 in what I've done," she says. "And I have only done what has come naturally to me when faced with my 18 child. Looking after Heidi has felt like a privilege. 19 her, I've known more joy in my life than heartache. My daughter has never 20 a burden, and caring for her has never been a chore." | ||||
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