We have learned ________ three hundred new words this term.
A:at once
B:at all
C:at times
D:at least
____ ____ ____ I'll be back soon.
词语释义选出与句子中划线部分意义最接近的选项。—Well done,boy!I take pride in you. —Thank you,sir.
雨后,常见到地面上有一些蚯蚓,这是因为( )
如图是在某激素作用下,小郭饭后血糖浓度的变化曲线,该激素是( )