A.0.1g | B.0.2g | C.2.7g | D.2.0g |
2 |
56-2 |
x |
2.7g |
2.7g×2 |
56-2 |
A.镁2g、氧气3g | B.镁3g、氧气2g |
C.镁1g、氧气4g | D.镁4g、氧气1g |
A.20g | B.15g | C.12g | D.6g |
A.2 | B.34 | C.40 | D.80 |
A.28.0g | B.44.8g | C.56.0g | D.78.0g |
A.Fe+H2SO4 | B.Fe+AgNO3 | C.Fe(OH)3+HCl | D.Fe2O3+HNO3 |
© 2017-2019 超级试练试题库,All Rights Reserved.