一般货船,总吨GT比净吨NT( )
一般货船,总吨GT比净吨NT( )
Cargo carrying weight capacity of cargo ships can be measured by ( ) . A: GT B: Suez Canal GT C: NDW D: NT
Cargo carrying weight capacity of cargo ships can be measured by ( ) . A: GT B: Suez Canal GT C: NDW D: NT
下列碳正离子的稳定性顺序是:( ) A: (1) > (2) > (3) > (4) B: (2) > (4) > (3) > (1) C: (1) > (3) > (2) > (4) D: (2) > (4) > (1) > (3)
下列碳正离子的稳定性顺序是:( ) A: (1) > (2) > (3) > (4) B: (2) > (4) > (3) > (1) C: (1) > (3) > (2) > (4) D: (2) > (4) > (1) > (3)
以下( )属于船舶的登记吨。①总吨GT②净吨NT③运河吨④载重吨
以下( )属于船舶的登记吨。①总吨GT②净吨NT③运河吨④载重吨
下面化合物的熔点高低次序是:( ) A: (1)>(3)>(2) B: (3)>(2)>(1) C: (1)>(2)>(3) D: (3)>(1)>(2)
下面化合物的熔点高低次序是:( ) A: (1)>(3)>(2) B: (3)>(2)>(1) C: (1)>(2)>(3) D: (3)>(1)>(2)
将下列化合物按极性大小排列顺序:(1)CH4 (2)CH3F (3)CH3Cl (4 )CH3Br (5)CH3I A: (1)>(2)>(3)>(4)>(5) B: (5)>(4)>(3)>(2)>(1) C: (2)>(3)>(4)>(5)>(1) D: (3)>(4)>(5)>(1)>(2)
将下列化合物按极性大小排列顺序:(1)CH4 (2)CH3F (3)CH3Cl (4 )CH3Br (5)CH3I A: (1)>(2)>(3)>(4)>(5) B: (5)>(4)>(3)>(2)>(1) C: (2)>(3)>(4)>(5)>(1) D: (3)>(4)>(5)>(1)>(2)
比较下列化合物的碱性强弱(1)脲(2)乙酰胺(3)乙胺(4)丙二酰脲 A: (1)>(2)>(3)>(4) B: (2)>(4)>(3)>(1) C: (3)>(1)>(2)>(4) D: (4)>(2)>(3)>(1)
比较下列化合物的碱性强弱(1)脲(2)乙酰胺(3)乙胺(4)丙二酰脲 A: (1)>(2)>(3)>(4) B: (2)>(4)>(3)>(1) C: (3)>(1)>(2)>(4) D: (4)>(2)>(3)>(1)
下列物质(1) CaO;(2) MgO;(3) NH3;(4) PH3熔点由高到低的顺序为:( ) A: (1) > (2) > (3) > (4) B: (1) > (2 ) > (4 ) > (3) C: (2) > (1) > (4) > (3) D: (2 ) > (1) > (3 ) > (4 )
下列物质(1) CaO;(2) MgO;(3) NH3;(4) PH3熔点由高到低的顺序为:( ) A: (1) > (2) > (3) > (4) B: (1) > (2 ) > (4 ) > (3) C: (2) > (1) > (4) > (3) D: (2 ) > (1) > (3 ) > (4 )
化合物(1)苯、(2)呋喃、(3)吡咯、(4)噻吩分别发生亲电取代反应的活性次序是() A: (1)>(2)>(3)>(4) B: (2)>(1)>(3)>(4) C: (3)>(2)>(4)>(1) D: (4)>(3)>(2)>(1)
化合物(1)苯、(2)呋喃、(3)吡咯、(4)噻吩分别发生亲电取代反应的活性次序是() A: (1)>(2)>(3)>(4) B: (2)>(1)>(3)>(4) C: (3)>(2)>(4)>(1) D: (4)>(3)>(2)>(1)
化合物(1)正丙基氯、(2)乙醚、(3)正丁醇、(4)仲丁醇的沸点由高到低的顺序为() A: (1)>(2)>(3)>(4) B: (3)>(4)>(1)>(2) C: (2)>(3)>(1)>(4) D: (2)>(4)>(1)>(3)
化合物(1)正丙基氯、(2)乙醚、(3)正丁醇、(4)仲丁醇的沸点由高到低的顺序为() A: (1)>(2)>(3)>(4) B: (3)>(4)>(1)>(2) C: (2)>(3)>(1)>(4) D: (2)>(4)>(1)>(3)