问题
单项选择题
平拱砖过梁用于非承重墙的门窗洞口处，其跨度不大于（）
A、1.2m
B、1.5m
C、1.6m
D、1.8m
答案
参考答案：A
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平拱砖过梁用于非承重墙的门窗洞口处，其跨度不大于（）
A、1.2m
B、1.5m
C、1.6m
D、1.8m
参考答案：A
| 完形填空。 | ||||
| Hearing is very important to all of us. We can 1 beautiful music, nice songs of birds, the laughter of people or other different kinds of 2 in the world with our ears. 3 we must try to protect our ears. The following will tell you 4 protect ears. Listening to 5 music a lot can be bad for ears, 6 when headphones (耳机) are used. So try not to wear headphones or 7 the volume (音量) when you're wearing headphones. You should give your ears a rest if you like wearing headphones. Before swimming, remember 8 earplugs (耳塞) into your ears or wear a swim hat to stop water 9 into your ears. If you are going to a concert, wear earplugs to protect your ears 10 the terrible music! 11 , special earplugs can be made for you if you go to concerts a lot or if you are a musician yourself. See a doctor if your ears 12 . 13 some medicine if the doctor asks you to do so. 14 the advice above now and you won't be saying "what?" when you are getting 15 . | ||||
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