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【单选题】
下列有关实验的说法正确的是（ ）A.
除去铁粉中混有的少量铝粉，可加入过量的氢氧化钠溶液，完全反应后过滤
B.
为测定熔融氢氧化钠的导电性，可在瓷坩埚中熔化氢氧化钠固体后进行测量
C.
制备Fe（OH） 3 胶体，通常是将Fe（OH） 3 固体溶于热水中
D.
某溶液中加入盐酸能产生使澄清石灰水变浑浊的气体，该溶液一定有CO 3 2-
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【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
【单选题】对于下列程序,正确的是() 。 void f(int *p) { *p = 5; } int main(void) { int a, *p; a = 10; p = &a; f(p); printf(“%d”, (*p)++); return 0; }
A.
5
B.
6
C.
10
D.
11
【简答题】Which sign means 'Save Water'? [ ] A B C D
【单选题】对于下列程序,正确的是 。 void f(int *p) { *p = 5; } int main( ) { int a, *p; a = 10; p = &a; f(p); printf(“%d”, (*p)++); return 0; }
A.
5
B.
6
C.
10
D.
11
【简答题】对于下列程序,正确的是() 。 void f(int *p)
{
*p = 5;
}
int main(void)
{
int a, *p;
a = 10;
p = &a;
f(p);
printf(“%d”, (*p)++);
return 0;
}A. 5 B. 6 C. 10 D. 11
【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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