根据规定,地陪送游客去机场(车站)应该提前到达机场(车站),如果地陪所送的是国内航班,应该提前()小时到达机场
A.1
B.2
C.1.5
D.90
参考答案:C
After you arrive, your host will usually _____ you a drink. Don't just say:"I'll have a Coke." Ask them what
they have available, and then make your choice. [ ]
A. offer
B. provide
C. supply
D. furnish
下列反应的离子方程式正确的是( )
A.次氯酸钙溶液中通入过量二氧化碳Ca2++2ClO-+H2O+CO2═CaCO3↓+2HClO
B.硫酸亚铁溶液中加过氧化氢溶液Fe2++2H2O2+4H+═Fe3++4H2O
C.用氨水吸收少量二氧化硫NH3.H2O+SO2═NH4++HSO3-
D.硝酸铁溶液中加过量氨水Fe3++3NH3.H2O═Fe(OH)3↓+3NH4+