A:大于5m/
B:等于5m/
C:小于5m/
D:不能确定
设函数f(x)=|2x﹣1|,实数a<b,且f(a)=f(b),则a+b的取值范围是 ____.
静止的氡核 86222 Rn放出α粒子后变成钋核 84218 Po,α粒子动能为Eα.若衰变放出的能量全部变为反冲核和α粒子的动能,真空中的光速为c,则该反应中的质量亏损为( )
The extraordinary success of Conan Dole, mainly with his Sherlock Homes, has_________ the market with detective stories.