急性脊髓炎的正常描述是()
A.以T3~T5节段最常受累
B.无病变节段束带感
C.脊髓休克期短暂
D.常表现为Brown-Sequard综合征
E.病理以白质髓鞘脱失为主
参考答案:A
—Why are you standing outside the gate?
—My father _____ me wait for him here. [ ]
A. asked
B. told
C. made
D. kept
我们把使用机械时,所做的 功在 功中所占的百分比,叫做机械效率。写成公式就是 。