【判断题】未成熟 B 细胞表面的 mlgM ,如果能与自身抗原结合,便会凋亡,而导致克隆清除,形成自身免疫耐受。
【单选题】电子商务经历了( )过程。
A.
Internet→dealer→web site
B.
web site→网上交易→Internet
C.
web site阶段→供应链Internet联结阶段→网上交易
D.
供应链Internet→web site阶段→网上付款
【单选题】You have a Web server named Server1 that runs Windows Server 2003 Web Edition Service Pack 2 (SP2). Server1 has 2 GB of RAM, two processors, and two physical disks. Volume C: is located on the first d...
B.
Install an additional processor.
C.
Move the Web site content.
D.
Create a new application pool.
【单选题】如图所示电路,以下说法正确的是 ( )
B.
.该电路由于不满足相位平衡条件不能产生正弦波振荡
C.
.该电路由于放大器不能正常工作,不能产生正弦波振荡
【单选题】如图所示电路,以下说法正确的是:
B.
该电路不能产生正弦波振荡,原因在于振幅平衡条件不能满足
C.
该电路不能产生正弦波振荡,原因在于相位平衡条件不能满足
D.
该电路不能产生正弦波振荡,原因在于振幅平衡、相位平衡条件均不能满足
【单选题】如图所示电路,以下说法正确的是()
A.
该电路无法产生振荡,静态时放大电路不能工作在放大区,应加输入耦合电容
【判断题】未成熟 B 细胞表面的 mlgM ,如果能与自身抗原结合,便会凋亡,而导致克隆清除,形成自身免疫耐受。
【单选题】What is a "sticky" Web site?
A.
A Web site that gains popularity through e-channels.
B.
A Web site that is accessed frequently because it is able to reroute potential consumers from other sites to it.
C.
A Web site that attracts consumers and encourages them to return.
D.
A Web site that is located by pop-up and pop-under ads.
【单选题】如下图所示电路,以下说法正确的是 ( )
A.
该电路由于放大器不能正常工作,不能产生正弦波振荡
C.
该电路由于不满足相位平衡条件,不能产生正弦波振荡