_____ a clerk work in a store? [ ]
A. Is
B. Are
C. Does
D. Do
答案:C
急性炎症性脱髓鞘性多发性神经病脑脊液蛋白-细胞分离在第几周达高峰()
A.第1~2周
B.第2~3周
C.第3~4周
D.第4~5周
E.第5~6周