挑战习题
1/5单选题
难度:

1.科学家在海洋中发现了一种冰状物质可燃冰,其有效成分为甲烷,下列说法不正确的是
A 甲烷是烃类物质中相对分子质量最小的物质
B 点燃甲烷前,不用检验其纯度
C 甲烷难溶于水
D 可燃冰是一种极具潜力的能源
提示1:
5pys6aKY6ICD6aqM55Sy54O355qE5oCn6LSo77yM5L2G5Y+v5Lul5qC55o2u5Y+v54eD5rCU5L2T55qE54K554eD5pON5L2c5p2l6Kej6aKY77yM6L6D5Li65a655piT6YCJ5oup5Ye65q2j56Gu55qE562U5qGI44CC
正确答案:Qg==
55Sy54O355qE56Gu5piv54OD57G754mp6LSo5Lit55u45a+55YiG5a2Q6LSo6YeP5pyA5bCP55qE54mp6LSo77yMQemhueato+ehru+8mzxicj7lho3ngrnnh4Plj6/nh4PmgKfmsJTkvZPml7bvvIzlv4XpobvopoHpqoznuq/vvIzku6XlhY3lj5HnlJ/ljbHpmanjgIJC6aG56ZSZ6K+v77ybPGJyPueUsueDt+aYr+S4gOenjemavua6tuS6juawtOeahOawlOS9k++8jEPpobnmraPnoa7vvJs8YnI+5Y+v54eD5Yaw55qE5Li76KaB5oiQ5YiG5piv55Sy54O377yM5piv5LiA56eN5p6B5YW35r2c5Yqb55qE6IO95rqQ77yMROmhueato+ehruOAgg==