题目

某溶液中有Fe3＋、Mg2＋、Fe2＋和Al3＋四种阳离子，若向其中加入过量的氢氧化钠溶液，搅拌后，再加入过量的盐酸，溶液中大量减少的阳离子是( ) A．Fe3＋             B．Mg2＋             C．Fe2＋         D．Al3＋ 答案：        C 完型填空 　　While in the army there was nothing I dislike so much as the map-reading course, for the simple reason that I always feel 　　1　　 even with a map in my hand．For weeks I had 　　2　　 awake at night thinking of the 　　3　　 test I would have to face at the end of the course．　　4　　 the evil day arrived．It was my responsibility to lead a small band of soldiers back to camp from the middle of 　　5　　．We were driven out in a(n)　　6　　 lorry and left in a ploughed field with 　　7　　 to get back to camp as quickly as possible． 　　Well knowing my 　　8　　, the soldiers smiled as they saw me looking at the map and they made all sorts of helpful suggestions．I folded the map up, put it in my pocket, and said that we would 　　9　　 east．After walking through the cornfield for over an hour we came to a wide stream．I looked at the map 　　10　　．It seemed to be 　　11　　 with masses of thin blue lines．But Which 　　12　　 line was this steam?In despair, we sat down in the cool 　　13　　 and I feel like 　　14　　 the map into the water．Fifteen minutes later, a boat passed and I asked the boatman if he could give us a 　　15　　 to the nearest village．I 　　16　　 that we had been out for a walk and 　　17　　 got lost．The boatman invited us on 　　18　　 and I felt 　　19　　 when he told me that he had helped hundreds of soldiers to pass their map-reading test!Not long 　　20　　, we got off that boat and, following the boatman's instructions, took a bus into the village and get back to camp． (1) [　　] A． stupid B． blind C． puzzled D． lost (2) [　　] A． suffered B． lain C． slept D． laid (3) [　　] A． basic B． actual C． practical D． special (4) [　　] A． At last B． At once C． As a result D． After all (5) [　　] A． village B． downtown C． nowhere D． forest (6) [　　] A． closed B． advanced C． ordinary D． damaged (7) [　　] A． suggestions B． directions C． information D． instructions (8) [　　] A． weakness B． thought C． task D． strength (9) [　　] A． head B． point C． march D． guide (10) [　　] A． gradually B． therefore C． merely D． again (11) [　　] A． spread B． painted C． covered D． separated (12) [　　] A． similar B． particular C． correct D． wonderful (13) [　　] A． tent B． shadow C． shore D． shade (14) [　　] A． tearing B． throwing C． striking D． destroying (15) [　　] A． lift B． hand C． favor D． service (16) [　　] A． declared B． pretended C． admitted D． described (17) [　　] A． altogether B． almost C． possible D． somehow (18) [　　] A． board B． boat C． purpose D． platform (19) [　　] A． afraid B． foolish C． fortunate D． interested (20) [　　] A． ago B． late C． afterwards D． away