液压千斤顶卸压时,打开回油阀不能(),以防下降速度过快发生危险。
A.太快
B.太慢
C.平稳
D.缓慢用力
参考答案:A
Supermarkets are necessary. People usually spend ______ time finding things they want, but they usually
spend ______ money than they want. [ ]
A. less; less
B. less; more
C. fewer; less
D. fewer; more
有关强迫障碍的描述,以下错误的是()
A.发病通常在青少年期
B.少数病人自发缓解
C.强迫的当时焦虑加重
D.单卵孪生的共病率大于多卵孪生者
E.病人常把他们的强迫看作是不合理的