向稀盐酸中逐渐加入试剂X后，溶液的pH变化情况如图所示。试剂X是下列物质中的
A、Mg
B、H2O
C、NaOH
D、CaCO3
答案：C
With the aid of the scientists, more new facts about the sea will _______ gradually.
A．bright to light
B．come to light
C．see through light
D．giveout light
已知CrKα线的能量为5.41keV，ArKα能量为2.96keV，求Cr的逃逸峰的波长？
