On lui demande _______ rester à son poste, mais il demande à partir.
参考答案： de
自动生化分析仪最常用的温度是（）
A.20℃
B.25℃
C.30℃
D.37℃
E.40℃
______they have been working hard to find?
A．Is that what
B．Is that
C．It is that
D．Is it that
