More than one student_______absent from Mr.Smith's class.[ ]
A. is
B. are
C. has
D. have
答案:A
______统计图可以很清楚地表示出各部分数量同总数之间的关系.
浮子式钢带液位计的测量准确度可达到()。
(A)±0.01%
(B)±0.015%
(C)±0.02%
(D)±0.03%