问题
单项选择题
下列属于半纤维素的是（）。
A.棉子糖
B.海藻糖
C.水苏糖
D.戊聚糖
E.麦芽糖
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
下列属于半纤维素的是（）。
A.棉子糖
B.海藻糖
C.水苏糖
D.戊聚糖
E.麦芽糖
参考答案：D
完型填空（共20小题；每小题1.5分，满分30分） 阅读下面短文，掌握其大意，然后从下列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。 Recently, my husband and I had the opportunity to do something good for two people who were complete strangers to us. It made us feel so good to be able to do it that I thought I should 21 . We were traveling down to Mexico for Thanksgiving week with our family. 22 we were sitting in the 23 first two seats in the first row of first class waiting for the plane to take off, I 24 heard one of the flight attendants(空乘) telling 25 that there was a couple sitting in the 26 of the plane who had just been married the previous day and were 27 off on their honeymoon. They had 28 their flight eight months in 29 but, owing to some schedule changes, had not been ab  le to get 30 together, and no one else on the plane was 31 to move and the bride was in 32 . I turned to my husband and told him what I heard. We 33 agreed and I called the flight attendant 34 to tell her that we’d be happy to give up our seats to this couple. The flight attendant seemed amazed and said “Really? Are you sure?” We said “Absolutely !” So, we 35 to the back of the plane in separate seats. The flight attendants were extremely 36 and took good care of us even though we were no longer sitting in first 37 , and we both made friends with the people sitting around us, who, as it 38 didn’t know why the young woman was crying or that they were newly married, and had a great flight. I had to go back to the front of the plane to 39 up a forgotten item at one point during the flight and 40 that the couple were sitting very close together, happily enjoy  ing champagne. It really made my day and Thanksgiving week get off to such a wonderful start !
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