鼎汉电源屏的交流输入欠压切换/保护回差电压为()V。
In determining if risk of collision exists the following considerations shall be among().
A. these taken into calculation
B. those taking into account
C. that taken into account
D. those taken into account
在XX雄性果蝇,性别致死基因具有活性,从而造成X染色体基因过量表达,使雄性致死。
A. 正确
B. 错误
证券登记是指证券登记结算机构为证券发行人建立和维护证券持有人名册的行为。()
A. 正确
B. 错误