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【简答题】
三相半波可控整流电路，输出平均电压波形脉动频率为（ ）HZ；而三相整流电路，输出平均电压波形脉动频率为（ ）HZ；这说明（ ）电路的纹波系数比（ ）电路要小。
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举一反三
【单选题】How does Bruno feel when he hears the news of his inheritance?
A.
excited
B.
sorry
C.
hardly believe
【简答题】编写程序,输入一个大写字母,然后顺序输出该字母的前驱字母、该字母本身、它的后继字母,不考虑输入字母为 ‘A’和‘Z’的情况。 输入:从键盘输入任何一个不是 A’或‘Z’的大写字母。 输出:所输入字母的前驱、本身和后继三个字母,字母间无间隔符号。
【单选题】—_________? —He’s fat and medium height.
A.
What does he do
B.
How old is he
C.
What does he look like
D.
What is he doing
【单选题】Why does Bruno lie when Shmuel is caught eating in Bruno’s house?
A.
He wants to play a prank on Shmuel.
B.
He does not want Shmuel to appear in his house.
C.
He wants to see how hungry Shmuel is.
D.
He was frightened by Lieutenant Kotler.
【单选题】土压盾构中泥土压调节方法是通过调节推进油缸的推进速率或螺旋输送器的转速进行控制。土压通过( )推进油缸的推进速率或( )螺旋输送机的转数来减小。
A.
增大、减小
B.
增大、增大
C.
减小、增大
D.
减小、减小
【单选题】若有以下定义和语句: char ch,*p1,*p2; p2=&ch; 则能正确进行输入的语句是
A.
scanf("%c",&p2);
B.
scanf("%c",*p2);
C.
*p1=getchar();
D.
*p2=getchar();
【单选题】土压盾构中泥土压调节方法是通过调节推进油缸的推进速率或螺旋输送器的转速进行控制。土压通过（ ）推进油缸的推进速率或（ ）螺旋输送机的转数来增大。
A.
增大、减小
B.
增大、增大
C.
减小、增大
D.
减小、减小
【简答题】已知a=7,执行以下表达式后,a的值是多少? a++
【单选题】How does Bruno’s father explain his new job?
A.
To train the farmers into qualified farmhands.
B.
To transform the farmers into better humans.
C.
To make everything better for everyone.
D.
To guard the work camp.
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