三秽是指( )
A．赫依、希日、巴达干B．隆、赤巴、培根C．稠、稀、汗D．土、金、木、水、火E．土、水、火、风、空
参考答案：C
He jumped at the opportunity when he saw the advertisement in a newspaper，because barely ________ make ends meet.
A．he could
B．could he
C．he couldn't
D．couldn't he
三螺杆泵适用于输送什么物料？
