失速信号中的空地信号的作用是:().
A.抖杆器地面通电
B.地面上抑制失速警告信号
C.使推杆器工作,使飞机尽快着陆
D.地面上,使抖杆器振幅减小
参考答案:B
单细胞生物细菌经过分裂产生两个新细菌,下列有关叙述正确的是[ ]
A.两个新细菌细胞中染色体数目和原细菌相同
B.两个新细菌的体积与原细菌相同
C.细菌分裂过程中细胞核首先发生变化
D.细菌分裂过程中细胞质首先发生变化
(75) Virus Security Software is designed to detect, eliminate or quarantine computer viruses before they are able to harm a computer or server networked system.
A.Anti
B.Invade
C.Inroad
D.Aggression