题目

下列说法正确的是（） A . 糖类、油脂、蛋白质是重要的营养物质，组成元素也相同 B . 在淀粉水解液中先加过量的氢氧化钠、再滴加碘水，溶液未变蓝，说明淀粉已经完全水解 C . 二氧化碳和环氧丙烷()在催化剂作用下可生成一种可降解的塑料 D . 花生油、羊油、水果中的异戊酸异戊酯都能发生皂化反应阅读下面短文，撑握其大意，然后从各题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。 I had a friend who visited me from out of town and I wanted to show him the CN Tower. It was one of the tallest structures on the earth. So I thought it would offer a (n)   36   sight. We were standing in line for 45minutes to enjoy the    37    up to the watch point. When we got there, we went around the   38     of the tower and saw the hard wire fence 39      to the structure serving as a barrier. We went back inside to look for the glass floor that provided a direct view   40     . As soon as both of us   41     , we stopped before walking onto it. We found that our legs began to   42   . I stopped for a minute 你  who have stood on it before.”I began to  46     that step onto the glass floor. I didn’t look down —  47     not for a few minutes. I walked on the    48    and looked around and thought about how   49    the experience was. I even found myself jumping up and down. There was no 50    , and it was certainly an illusion. I considered how many things in our lives we 51     and exactly how many of them are actually illusions. I thought about all the things we   52     ourselves from doing because we have   53    ourselves into thinking there’s risk. I thought about all the things that I still have yet to do that appeared 54    . I was glad to discover that although fear isn’t a stranger to me, my desire to live a life without    55    has a much stronger pull. 1.A．expressive        B．impressive  C．frightening  D．beneficial 2.A．bus  B．ladder          C．car      D．elevator 3.A．outside    B．top      C．center         D．surface 4.A．connected        B．surrounded         C．referred      D．combined 5.A．around     B．up       C．down  D．out 6.A．understood      B．approached         C．talked D．returned 7.A．wave        B．move  C．tremble       D．wander 8.A．look over B．think over   C．look up        D．think up 9.A．tighter      B．taller   C．weaker        D．stronger 10.A．happily  B．simply C．greatly         D．relatively 11.A．take        B．choose        C．decide        D．pick 12.A．at most  B．at least         C．at last          D．at best 13.A．fence     B．floor   C．edge   D．tower 14.A．grateful B．useful C．wonderful   D．helpful 15.A．death     B．warn   C．trouble        D．danger 16.A．handle   B．ignore          C．fear     D．hide 17.A．block     B．protect        C．help    D．separate 18.A．forced   B．advised        C．entered       D．led 19.A．amazing B．worrying     C．exciting       D．interesting 20.A．cost       B．doubt C．regret D．waste