①原式=2-14+14-1=1;
②原式=12×12-32×33=6-36=-26.
China has promised to revise its existing regulations and ______ new policies according to WTO requirements.
A. forming
B. to form
C. to be forming
D. have formed
在测井作业前要()转盘,配合测井队吊升测井设备和仪器。
A.启动
B.开启
C.固定
D.解锁