胃液中与红细胞成熟有关的物质是:( )
A. 胃酸
B. 胃蛋白酶
C. 内因子
D. 粘液
She is living ( ) that some player just get better with age.
A. champion
B. heroine
C. proof
D. memory
Our teacher usually finishes( )each of her sentences by looking straight into one of the students' eyes.
A. up
B. down
C. in
D. with
轨距:记录实量值与标准值的误差。+、-的确定:轨距()于标准值为“+”,“+”号可以省略不写。
A. 小
B. 等
C. 大
D. 大于等