中国植物学家()和()发现光照改变对光合作用速率的瞬间效应。并得出准确的()
查看答案
弧形闸门的侧止水座板是对应于面板橡胶止水而预埋的封水装置,用型钢或钢板制作。
A. 正确
B. 错误
Which action enables an administrator to make a VIO Server automatically activate when the physical machine is powered on?()
A. Ensure the /etc/auto_start file exists on the VIos
B. Ensure the ’cfgdev -a boot=yes’ command has been executed.
C. Select the ’Automatically start when the managed system is powered on’ option within the vio Server lpar profile.
D. Add the VIO Server to the ’Automatically start when the managed system is powered on’ field on the managed System properties.
链传动张紧的目的()
A. 避免链条垂度过大时产生啮合不良
B. 避免链条垂度过大时链条振动
C. 增加链条与链轮的啮合包角
D. 都对
化学试剂按其纯度通常分为优级纯、()、()、实验试剂等四级。