嘉兴素有“浙北粮仓”的美誉，水稻是我们嘉兴最重要的粮食作物．如图所示为一水稻植株

下列离子方程式改写成化学方程式正确的是

A．Cu²⁺ +2OH^- =Cu(OH)₂↓ CuCO₃+2NaOH=Cu(OH)₂↓+Na₂CO₃

B．CO₃^2- + 2H⁺ = CO₂ ↑+ H₂OBaCO₃ + 2HCl =BaCl₂+ CO₂↑ + H₂O

C．Ca²⁺ + CO₃^2- = CaCO₃↓Ca(NO₃)₂+NaCO₃ = CaCO₃↓+NaNO₃

D．H⁺ +OH^- = H₂OBa(OH)₂+2HNO₃ = Ba(NO₃)₂ +2H₂O

I have had my bike _____, and I'm going to have somebody______ my radio tomorrow.

A．repair; to repair

B．repairing; to be repaired

C．repaired; repair

D．to repair; repairing

牙轮钻头两种破碎地层的作用是（）和（）。

代理记账就是企业委托有会计从业资格证书的人员进行的记账行为。( )

某船在主甲板餐厅旁的粮食舱内安装了照明灯和开关，同时设置了一台冰柜和为冰柜供电的插座。请分析