单一化学驱各有优缺点,在()条件下将它们混合或联合使用,在功能和作用机理上优势互补,能达到最佳驱油效果。
A、复配
B、配伍
C、配合
D、配对
参考答案:B
The disco, digitally in the studio, sounded fantastic at the party that night.[ ]
A. recording
B. having recorded
C. to be recorded
D. recorded
直拍反手攻球或推挡时,食指和中指协调用力,拇指相对()
A.放松
B.紧张
C.用力