A、实验研究
B、基础研究
C、应用研究
D、个案研究
E、理论研究
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将一个阻值是4Ω的电热器放进质量是0.5kg的冷水中,通过电热器的电流是5A,且电热器放出的热量全部被水吸收,则7min可使水温升高多少摄氏度? |
A.5kg的冷水中,通过电热器的电流是5A,且电热器放出的热量全部被水吸收,则7min可使水温升高多少摄氏度?
A、月经终止
B、发胖
C、潮热
D、卵巢停止产生雌激素
A、饮食
B、有规律的锻炼
C、健康的生活方式
D、劳动
已知冰的比热容为2.1×103J/(kg·℃),0.8kg的冰在吸收了8.4×103J的热量后,温度升高到-4℃,求冰的初温度。 |
A.1×103J/(kg·℃),0.8kg的冰在吸收了8.4×103J的热量后,温度升高到-4℃,求冰的初温度。
A、发现
B、观察
C、实验
D、验证
E、记录
A、文化
B、个体差异
C、种族
D、多样性
E、性别差异
A、树突
B、胞体
C、轴突
D、轴突末梢
E、髓鞘
A、权威型
B、专制型
C、宽容型
D、放任型
E、保护型
The people in the five regions in Europe, Latin America,Asia and the US that live to be 100 have a lot going for them. Genes probably play a small role, but these folks also have strong social ties ,tightly-knit families and lots of opportunities to exercise.
A.
52.
B.People
C.People
D.People
E.People
F.To
G.To
H.To
I.To
J.In
K.Any
L.In
M.In
N.Tea-Drinking
O.Lifestyle
P.Tea-Drinking
Q.Blue
最新试题
According to Steven Waelbers,the robot is designed to().
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