一根粗细均匀的电阻线,阻值为5Ω,若将它截去一半,然后均匀拉到原长,则此时电阻线 发布时间:2017-05-16 18:32 │ 来源:www.tikuol.com 题型:选择题 问题: 一根粗细均匀的电阻线,阻值为5Ω,若将它截去一半,然后均匀拉到原长,则此时电阻线的电阻为( )A.大于5ΩB.小于5ΩC.等于5ΩD.无法判断
题型:选择题 选词并用其适当形式填空。peel, love, become, buy, shark, how much, want, talent, famous1. Yesterday I saw many big _____ at the aquarium. They are terrible, and they eat small fish. 2. —I need some honey. —OK. _____ honey do you need? —Two teaspoons. 3. She could play computer games when she was two. She is _____. 4. Could you _____ an apple for me? 5. Yao Ming is one of ______ basketball players. He plays basketball very well. 6. Gina _____ to be a computer programmer. She studies English and math hard. 7. —Did you buy any souvenirs when you visited Suzhou? —Yes. I _____ lots of souvenirs. They are interesting. 8. I want to be a singer, but my mother wants me to _____ an engineer. 9. His grandmother is _____. She often buys something delicious for her grandchildren. 查看答案
题型:选择题 有关使用堵漏毯的说法,下列正确的有()①适用于舷外水线附近及以下船壳较平坦和一般弯曲部位,不适合首尾弯曲太大的部位;②绒面朝向破洞,靠水压压紧;③不可能将洞口堵严,只能减少进水量。A.①、②;B.①~③;C.①、③;D.②、③。 查看答案