肾病综合征患儿,应用免疫抑制剂时,白细胞下降需停药的指征是
A.<1.5×109/LB.<4×109/LC.<3×109/LD.<5×109/LE.<2×109/L
参考答案:C
吊钩开口达原尺寸的10%时应报废,其检验工具()。
A、游标卡尺
B、千分尺
C、塞尺
I would have accompanied you to the cinema yesterday, but I () no time.
A. had had
B. could have had
C. might have had
D. had