题目

When I met my husband, Mark, I found out that his parents speaks only Spanish. As our relationship  36  I know that I has to take it upon myself to learn the language. It was terrifying, but  37  and I wanted to make the effort. I thought that the best way to show his parents how much I  38  about their culture and their son was to enroll in（注册）a Spanish school in Mexico to study and learn their  39  language. I know, I could have taken Spanish class anywhere, but I  40  that if I was going to REALLY learn the language, I should   41  it. So I   42  to San Migue下列反应离子方程式正确的是A．FeCl3溶液刻蚀铜制的印刷电路板：Fe3+ +Cu ＝ Fe2+ + Cu2+B．硅酸钠溶液和稀硫酸混合：Na2SiO3＋2H＋ ＝ H2SiO3↓＋2Na+C．Ba(OH)2溶液与稀硫酸反应：Ba2++OH－+H++SO42－＝BaSO4↓+H2OD．向氯化铝溶液中滴加过量氨水：Al3＋＋3NH3·H2O＝Al(OH)3↓＋3NH4＋