Which of the following statements is mot correct about mirroring?()
A. Mirroring, with the write-verify option turned on, can be used to increase performance.
B. Mirroring is a better choice that disk-striping, for large sequential-access file system when one is looking for performance.
C. Mirroring, with a parallel-scheduling policy, may improve I/O read-operation performance.
D. Mirroring, with maximum inter-disk allocation policy, is used to enhance availability.
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钢丝绳绕过圆筒或滑轮的直径不得大于绳直径的18倍。
A. 正确
B. 错误
能防止血细胞凝集和血栓形成,改善血流的胶体液为()
A. 全血
B. 血浆
C. 清蛋白
D. 低分子右旋糖酐
E. 羟乙基淀粉(代血浆)
“不愤不启,不悱不发”中“愤”与“悱”的意思是()
A. 愤:心求通而未得之。悱:想说而说不出来
B. 愤:愤怒。悱:口欲言而未能其貌
C. 愤:感觉不满足,努力地去做。悱:感觉心情不舒畅
D. 愤:因不满足而心情激动。悱:感觉心情不舒畅
在张力性气胸的病理生理改变中,下列哪项是错误的()
A. 较大较深的肺裂伤,裂口形成活瓣
B. 纵隔左右摆动
C. 严重呼吸循环障碍
D. 皮下气肿
E. 伤侧和健侧肺均被严重挤压