利用化学诱变剂对果蝇(P)进行诱变,下列说法正确的是:()
A. 应在减数分裂前诱变,不能在减数分裂后诱变
B. 无论何时诱变,F1外交所产生的F2均有1/2含有相同突变
C. 减数分裂后诱变,导致F1形成嵌合体
D. 诱变果蝇产生的子一代之间杂交,会有1/4的可能性产生突变纯合体
平流沉淀池设计和运行中的关键在于均匀布水、均匀集水和()。
A. 水平流速
B. 排泥彻底
C. 水力条件
D. 管理制度
A financial institution is required to store their monthly transaction statements for 7 years. Theremust be proof that upon closure of the statements there is no alteration to the files after that date.Which of the following would the storage specialist discuss as a possible course of action to meetthis requirement?()
A. archive data to encrypted disk
B. archive data to LTO-5 WORM media
C. backup data todeduplicated disk pools
D. backup data to encrypted LTO-5 using standard media
设备和装置在运行中一旦发现可疑的吸引、推斥、放电以及非设备漏电而使操作人员受到电击等现象时,即应测试确定是否()所致。