续断为伤科常用药。()
参考答案:对
Those flowers are ________ for your mother on her seventieth birthday.[ ]
A. intended
B. devoted
C. supplied
D. produced
燃料检修车间电动葫芦起吊重物时,选用钢丝绳的安全系数是()。
A.2~3
B.3~4
C.4~5
D.5~6