You do look _______．You are not at all like a person who has been ill in bed for years．
A. good
B. well
C. sad
D. disappointed
_________
A. result from
B. make
C. take
D. result in
The word “surface” in the passage means the ______．
A. market
B. air
C. top of a liquid
D. sea
标定Na2S2O3的基准物是下述哪一种？（) A．H2C2O4·2H2O B．K2Cr2O7 C．As2O3 D．Fe标定Na2S2O3的基准物是下述哪一种？( )
A. H2C2O4·2H2O B．K2Cr2O7C．As2O3D．Fe
微信支付 
支付宝支付