Smoky quartz is the quartz contains trace amounts of:
A: Al
B: Fe
C: Ca
D: Mg
A: Al
B: Fe
C: Ca
D: Mg
举一反三
- 弱酸性阳离子交换树脂,对水中的阳离子交换吸附顺序是()。 A: Fe>Al>Ca>Mg>K>Na>H B: H>Fe>Al>Ca>Mg>K>Na C: H>Na>K>Mg>Ca>Al>Fe D: Fe>Al>Ca>Mg>H>Na>K
- 弱酸性阳离子交换树脂的选择顺序为() A: Fe>Al>Ca>Mg>Ag>K>Na>H>Li B: H>Fe>Al>Ca>Mg>K>Na>Li C: Fe>Al>H>Ca>Mg>NH>K>Na D: Fe>Al>Ca>Mg>H>Na>K
- 强酸性阳离子交换树脂,对水中的阳离子交换吸附顺序是()。 A: Fe>Al>Ca>Mg>K>Na>H B: H>Fe>Al>Ca>Mg>K>Na C: Fe>Al>Ca>Mg>H>Na>K D: H>Na>K>Mg>Ca>Al>Fe
- The four most abundant elements in soil are ( ). A: O, Si, Al, Fe B: K, Na, Ca, Mg C: O, Al, K, Na D: Si, Al, Ca, Mg
- What are the the form of silica? A: alpha quartz B: beta quartz C: tridymite D: Normal atmospheric dusts