—The difficult maths problem has been solved by Tom at last.
— Indeed; and the ___ way Tom worked out the problem impressed the teacher deeply.
A:outstanding
B:unique
C:particular
D:strange
某研究性学习小组就“不同水质对蛙卵孵化的影响”进行了探究,其实验记录如下表:
组别
项目
水质
水量
水温
蛙卵数
孵出的蝌蚪数
A组
河水
500毫升
22℃
30个
28只
B组
蒸馏水
10℃
9只
该实验设计不妥之处是( )
Another d____ from H7N9 bird flu was reported by the Department of Health of Jiangsu Province on April 15, 2013.
用同一台显微镜观察同一标本,通过更换目镜、物镜和调节细准焦螺旋后,在视野内分别观察到了下列图象.其中视野最亮的是( )