【单选题】已知有如下定义和输入语句,若要求 a1,a2,c1,c2 的值分别为 10 , 20 , A 和 B ,当从第一列开始输入数据时,正确的数据输入方式是 ( )。 int a1,a2; char c1,c2; scanf("%d%c%d%c",&a1,&c1,&a2,&c2);
【简答题】一个感性电路元件,在外加 40V 的工频电压( f =50hZ )时,测得电路电流为 4A ,外加 40V 的直流电压时,测得的电路电流为 5A 。请确定电路参数( R 和 L )。
【单选题】People's decisions to migrate might be influenced by all the following EX CEPT ______ .
【单选题】Which of the following statements is true about ex-smokers according to the passage? ______.
A.
They begin to develop some diseases after quitting smoking
B.
They can benefit little from quitting if they are heavy smoking
C.
They are less likely to die after quitting even if they have serious diseases
D.
They may regain their health almost completely if they quit in time
【多选题】关于新生儿溶血病的叙述正确的是
C.
若需要换血治疗,换血量应控制在170ml/kg
【单选题】已知: char b[20] ;若要从键盘输入字符串 “ hello World ! ”给 b ,则正确的输入语句是 __________ 。
B.
scanf ( “ %s ”, b[20] );
【单选题】已知: char b[20]; ,若要从键盘输入字符串 "Hello World" ,则正确的输入语句是 。
D.
scanf( " %s " ,b[20]);
【单选题】“不懂体育的人,不应该做学校的校长”是下列哪位教育家说的。