以下程序输出结果为( )。 class test 2 { public s_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

以下程序输出结果为( )。 class test 2 { public static void main(String args[]) { int n = 7; n＜＜=3; n=n&n+1|1n+2^n+3; n＞＞=2; System.out.println(n); } }

A．0

B．-1

C．14

D．64

答案

参考答案：C

解析：第1个赋值语句使得n的值为7， 7的二进制形式为00000111，第2个赋值语句可写为n=n＜＜3，n左移3位的结果为 00111000，即第3个赋值语句的运算顺序为 (((n&n)+(1|n))+(2^n))+3，运算结果为57(十进制)，其二进制形式为00111001，第4个赋值语句使n的值右移2位，由于n的符号位为0，因此，在右移时左边填充位为0，即 00001110，其十进制形式为14。

完形填空

阅读下面短文，掌握其大意，从每题所给的A、B、C、D四个选项中，选出最佳选项。
Nowadays lots of students ask their parents for money to buy things they like. For me, to ask for money is like entering a(n) _36__. I learned this from 37 .
Last year my mother told me that the _ 38  way I would get a driver’s license before I turned eighteen depended on _ 39  I paid for the classes myself. “What?” I asked in _ 40  . But I knew _ 41  that my reasoning would have no_ 42  on the situation, 43__ by the look on my mother’s face.
Three weeks later, I started working _ 44 a hostess at a factory, twice a week. A month later I paid $ 270 for driving lessons, and then over $ 20 to _ 45  my permit test. My pockets were empty _ 46  as soon as they were filled.
My mother thought that I’d be _ 47  to do things without her help. The funny thing was that even though I was totally _ 48  in the beginning, I truly appreciated it, _ 49  if I had just been handed bills from her.
When I realized that my mother wasn’t going to _ 50  something like a driver’s license, at first, it seemed as if she had __51__ an immovable block before me and I would never _ 52  it. But my mother was __53 _. She knew that I wanted a luxury（奢侈品）but _ 54  me to get it. That is as _ 55  as this ---- if I really want it, I’ll find a way to get it myself.

C．battlefield

D．surprisingly

D．being judged

B．rather than

C．get through

填空题

助燃物质的存在是物质起火的基本条件之一，最常见的助燃物质是（）。