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【单选题】
用于包装冷藏食品的包装材料,主要考虑其_____特性。A.
防湿
B.
抗氧化
C.
耐低温
D.
B 和C
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举一反三
【多选题】某一旅游风景区，目标市场是国内中低档观光度假游客，尤其是周末二、三日游比重较大。该景区内原有饭店5座，其中三星级2座，二星级3座，1997年平均房价为100元，平均出租率为60%。
请根据上述情况，回答下列问题：
1998年有几家投资者欲进入这一景区进行饭店投资，且有两家计划投资建造四、五星级的大型饭店以提高自身声望和景区旅游服务的档次。如果投资实现的话，将使景区内客房可供量增加20%，在景区吸...
A.
与目标市场中低档定位不符
B.
投资额过大，无法筹集资金
C.
不具备规模经济的基础
D.
房价过高，游客难以承受
【单选题】听力原文： Many egg-laying animals merely lay their eggs and leave. Turtles for instance, leave their eggs to hatch on their own. The current theory about birds is that the earliest birds did just that whe...
A.
Their flying ability improved greatly.
B.
They became warm-blooded.
C.
They began to lay eggs.
D.
They changed their migration patterns.
【单选题】听力原文： Many egglaying animals merely lay their eggs and leave. With turtles for instance, the eggs hatch on their own. The current theory about birds is that the earliest birds did just that, when they...
A.
How birds' nests have evolved.
B.
Why some birds' nests am considered primitive.
C.
How birds learn to build nests.
D.
Why birds lay eggs.
【简答题】3 Do the following statements agree with the information given in Reading Passage 3? TRUE if the statement agrees with the information FALSE if the statement contradicts the information NOT GIVEN if t...
【单选题】听力原文： Many egg-laying animals merely lay their eggs and leave. Turtles, for instance, and horseshoe crabs, the eggs hatched and the little ones are their own. The current theory about birds is the ear...
A.
Their flying ability improved greatly.
B.
They became warm-blooded.
C.
They began to lay eggs.
D.
They changed their migration patterns.
【简答题】第27届亚太杯上海赛区选拔赛四年级A卷第28题解析28、某班的小书库里有 A、B、C、D四类书，规定每个同学最多可以借两本，这个班有 45名同学。问至少有几个同学所借的书类型完全相同?(不能不借)
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