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【单选题】
B型超声诊断仪的显示是采用（ ）A.
数字调制
B.
亮度调制
C.
速度调制
D.
幅度调制
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举一反三
【单选题】用 HC1 溶液滴定 NaOH 和 Na 2 CO 3 混合液 , 以酚酞为指示剂 , 消耗 HC1 V 1 mL , 继续以甲基橙为指示剂滴定 , 又消耗 HC1 V 2 mL , V 2 与 V 1 的关系是
A.
V 1 ＞ V 2
B.
V 1 < V 2
C.
V 1 = V 2
D.
V 1 = 2 V 2
【单选题】what do the underlined parts mean in "Martin, with his brown hair and eyes, his freckled face and his little fair moustache, looked too young to be married , and his wife looked hardly more than a gir...
A.
too young that he shouldn't have got married ; she is not a real girl
B.
too young to be allowed to get married ; she is a hard girl
C.
too young that he looks unmarried ; she is just a little girl
D.
too young that he looks unmarried ; she is a big girl
【简答题】编写程序,从键盘输入三个整数,按数值由小到大的顺序输出。 #include void main() { int a,b,c,x; printf(" 请输入 3 个整数: "); scanf("%d%d%d",&a,&b,&c); if(a
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