不经过配子直接由珠心或珠被的二倍体细胞产生胚的生殖方式是()。
A、单性结实
B、不定胚
C、二倍配子体无融合生殖
D、单性生殖
参考答案:B
In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.
To a router, a flow is a (71) of packets that share the same characterstics, such as traveling the same (72) , using the same (73) , having the same kind of security, and so on. A router that supports the handling of flow labels has a (74) table. The table has an entry for each Active flow label; each entry defines the (75) required by the corresponding flow label.
(73)是()
A.source
B.resources
C.route
D.Entry
下列行为中,没有违反《中华人民共和国妇女权益保障法》的是( )。
A.某单位辞退了怀孕的小李B.某单位招收了一位年满17周岁的未成年女工C.由于家庭生活困难,老王让自己正在上小学的女儿辍学回家干活D.某公司未经王女士同意,以营利为目的,将其肖像印发在广告画上