连接半挂车时,使牵引车的牵引座与挂车的牵引销连接后,将锁止杆置于哪个位置?
A.锁止
B.松开
C.紧固
D.断开
参考答案:A
根据词意,用括号中所给词的适当形式真空。
小题1:I’m hungry now, I can eat two .(sandwich)
小题2:I just finished the e-mail to Mary? (write)
小题3:Mary is out, she should have a rest.(stress)
小题4:Do you think you are than your father? (outgoing)
小题5:Tom is planning the Great Wall next Sunday.(visit)
女性,55岁,下壁心肌梗死冠状动脉支架置入术后4个月,其合适运动量的主要标志是训练过程中()
A.稍出汗
B.无任何不良反应出现
C.心率增加<20次/分钟
D.心率增加超过20次/分钟
E.心率增加在20次/分钟左右