题目

甲烷和水反应可以制水煤气（混合气体），其反应的微观示意图如图所示：根据微观示意 图得出的结论中，正确的是 A. 反应前后各元素的化合价均不变 B. 水煤气的成分是一氧化碳和氧气 C. 该反应中含氢元素的化合物有3 种 D. 该反应的化学方程式中甲烷和水的计量数之比为1：1 答案：D阅读下面短文，掌握其大意，然后从11～30各题所给四个选项(A, B, C 和 D)中选出最佳选项. 　　The night was dark, though sometimes the moving clouds allowed a star or two to be seen in the sky. The poor men held on to any bit of wood they could find. They called to the Marie for 1 , but she was far 2 the reach of the human voice. At one o'clock in the morning, the water was getting 3 , and a strong 4 had begun to blow. Suddenly 5 were seen in the distance; another ship! The shouts of the swimmers were heard on board, and willing hands pulled them out of the water. The 6 of the ship that had so 7 arrived on the scene in time to save their lives was Ellen. What had brought her to the exact spot through the 8 and the pathless sea? Her captain had known 9 about the wreck(沉船) and had indeed attempted to sail away from it. But let him speak for himself. 　　“I was forced by the wind,”he said long afterwards,“to 10 my course(航道). Just as I did it, a small 11 flew across the ship once or twice and then 12 at my face. I took 13 of this until exactly the same thing happened at a 14 time, which caused me to think it rather 15 , while I was thus 16 it, the same bird for the third time, made its appearance and flew 17 in the same way as before. I was then 18 to change my course back to the original(原来的) one. I had not gone far 19 I heard strange noises; and when I tried to 20 where they came from, I found I was in the middle of people who had been shipwrecked. I immediately did my best to save them.” (1) [　　] A. foodB. helpC. restD. stop (2) [　　] A. betweenB. outC. beyondD. in (3) [　　] A. colderB. deeperC. saltierD. warmer (4) [　　] A. smokeB. waveC. sandD. wind (5) [　　] A. peopleB. lightsC. shipsD. houses (6) [　　] A. nameB. ownerC. captainD. person (7) [　　] A. slowlyB. early C. immediatelyD. fortunately (8) [　　] A. lightB. windC. darknessD. water (9) [　　] A. everythingB. nothing C. somethingD. anything (10) [　　] A. continueB. turnC. changeD. sail (11) [　　] A. lightB. flyC. planeD. bird (12) [　　] A. flewB. stoppedC. stayedD. looked (13) [　　] A. no careB. good care C. no noticeD. some notice (14) [　　] A. goodB. secondC. thirdD. long (15) [　　] A. interestingB. funnyC. commonD. unusual (16) [　　] A. searchingB. expecting C. consideringD. studying (17) [　　] A. backB. aboutC. upD. down (18) [　　] A. decidedB. advised C. persuadedD. invited (19) [　　] A. whenB. whileC. asD. after (20) [　　] A. listen toB. search for C. make sureD. look out