选择题：现代以石油化工为基础的三大合成材料是（） ①合成氨 ②塑料 ③合成橡胶 ④医药

题型：单项选择题

招标人在发布招标公告或投标邀请书的（）日内必须提交与招标项目和招标活动有关的资料，向项目所在地的县级以上地方人民政府房地产行政主管部门备案。

A.20

B.15

C.10

D.5

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题型：完形填空

Once upon a time, a Japanese man wanted to rebuild his house. First he had to tear the walls open .Japanese houses  36  have hollow(

空的)spaces between the wooden walls. As he was 37 them down, he found a lizard(蜥蜴) 38 there because a nail(钉子

)from the outside had been hammered into one of its feet. Seeing this, he felt  39 for it, and at the same time was curious about it.

     He knew very well that the  40  had been hammered 10 years before when the house was first  41   . What had happened since? The lizard had  42  for 10 years! To be stuck in a dark wall for 10 years without  43 —it hardly seems possible, and is hard to   44  . Then he wondered how the lizard could have lived for 10 years without moving a single step —since its   45  was nailed! So he stopped work and began to   46  the lizard. He wanted to know what it had been doing, and what and   47  it had been eating.

     A short time later another lizard   48  with food in its mouth. He was shocked, and at the same time deeply   49  . Another lizard had been feeding the stuck one   50 the past ten years.

     "What love  51 in this tiny creature! What can love do? It can do  52 ! Just think, one lizard has been   53  another untiringly for 10 long years, without   54 hope that its partner would be saved,"the man marvelled.

If a small creature like a lizard can 55 like this, just imagine how we could if we tried