99mTc-植酸钠肝脏显像的原理是
A. 细胞吞噬
B. 循环通路
C. 选择性摄取浓集 D.合成代谢
D. 通透弥散
患者,男,35岁,腹痛腹泻反复发作5年,食欲不振,恶心,呕吐,发热,腹痛位于左下腹,压痛,X线检查可见结肠黏膜紊乱,结肠袋形加深,肠壁痉挛,溃疡所引起的外廓小刺或锯齿状阴影,应首先考虑
A. 肠伤寒
B. 肠结核
C. 痢疾
D. 溃疡性结肠炎
E. 克罗恩病
Businessmen make most of their income from profit()by producing and selling products.
A. earning
B. is earned
C. earn
D. earned
(), we decided to go swimming in the sea.
A. It being a fine day
B. The day was fine
C. It was a fine day
D. Being a fine day