神经系统结核病的高危人群包括()
A.艾滋病病人
B.经常接触结核传染源者
C.酒精中毒和营养不良者
D.老年人
E.长期用类固醇治疗者
参考答案:A, B, C, D, E
My sister was very afraid all the way because it was the first time she ______ a car. [ ]
A. has driven
B. drove
C. had driven
D. is driving
用游标为10分度的卡尺测定某小球的直径时,卡尺上的示数如图,可读出小球的直径为: mm。