在计算机中采用二进制，是因为( )。 A．可降低硬件制造成本 B．两个状态的系统具

以下程序运行后的输出结果是______。
#include＜stdio.h＞
main()
FILE *fp; int x[6]=(1, 2, 3, 4, 5, 6), i;
fp=fopen("test.dat", "wb");
fwrite(x, sizeof(int), 3, fp);
rewind(fp);
fread(x, sizeOf(int), 3, fp);
for(i=0; i＜6; i++) printf("%d", x[i]);
printf("\n");
fclose(fp);

已知函数f（x）=x³+ax²+x-1．

（Ⅰ）当a=-2时，求函数f（x）的极大值与极小值；

（Ⅱ）讨论函数f（x）的单调区间．

据统计，合并用药6～10种，不良反应的发生率大约是

A．0.1%

B．1%

C．4%

D．7%

E．10%

根据课文内容用适当的词填空，使短文完整。(一空一词)

    Not long ago, a girl called Daisy took a magic 1.______ around the world, riding a

flying chair. First, she came to Tibet in China to visit antelopes. But to her great

2._____, she could only see mountains and people.

    Then an antelope told her 3.______ that they were being killed 4.______ large numbers

by humans for their wool to make clothing. And they might be 5._______ forever in three

years. Then the flying chair took Daisy to Zimbabwe, 6.______ wildlife was properly

protected. Daisy was glad to learn that farmers there were not killing the animals at

will as they 7._____ to. Only a certain number of the animals were set to be 8.______ for

fee by the government, 9.______ not only saved the animals but benefited the farmers as

well.

    At last, Daisy flew to a 10.______ rainforest. There she was puzzled to see a monkey

11.______ (rub) a millipede insect over its body. Then the monkey told her the insect

contained a 12._______ drug which affected mosquitoes and 13._______ rubbing it over the

body it could 14._______ itself from mosquitoes. Now Daisy was amazed and excited to find

in fact the forest 15._______ a lot of precious things people can make use of. So

protecting nature really means much to our humans.

关于增值税一般纳税人放弃免税权的说法，正确的有( )。

A．纳税人可选择某一免税项目放弃免税权

B．纳税人应当以书面形式提交放弃免税权声明

C．纳税人可根据不同的销售对象选择部分货物或劳务放弃免税权

D．纳税人在免税期内购进用于免税项目的货物所取得的增值税扣税凭证一律不得抵扣

E．纳税人自税务机关受理放弃免税权声明的次月起5年内不得申请免税