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【单选题】
下列有关新型高分子材料的说法中，不正确的是 [ ]A.
高分子分离膜应用于食品工业中，可用于浓缩天然果汁、乳制品加工、酿造业等
B.
复合材料一般是以一种材料作为基体，另一种材料作为增强材料制成的
C.
导电塑料是应用于电子工业的一种新型有机高分子材料
D.
合成高分子材料制成的人工器官都受到人体的排斥作用，难以达到生物相容的程度
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举一反三
【单选题】Dumped waste might contaminate water supplies
A.
destroy
B.
decrease
C.
delay
D.
pollute
【单选题】关于下列程序段的输出结果,说法正确的是: public class MyClass{ static int i; public static void main(Stringargv[]){ System.out.println(i); } }
A.
有错误，变量i没有初始化。
B.
1
C.
0
【单选题】Next, John Snow ______ the source of the water for these two streets and found it came from the polluted river.
A.
looked into
B.
looked up
C.
looked after
D.
looked around
【简答题】Which sign means 'Save Water'? [ ] A B C D
【单选题】The sign "Water Polluted - No Swimming Allowed" means ________.( )
A.
the water is for special use and you can't swim in it
B.
the water is not healthy to human body and no one is to swim in it
C.
the water is dirty and you can't swim in it without special permission
D.
the water is clean drinking water and you are not allowed to swim in it
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