乳食积滞腹痛的特点是()
A.阵发性绞痛,得温则舒
B.腹满胀痛,口气酸臭
C.痛如针刺,痛有定处
D.腹部隐痛,痛处喜按
E.腹痛绕脐,时作时止
参考答案:B
Which of the following factors of production is least likely to be fixed in the short run()
A. Capital equipment.
B. Labor.
C. Plant size
VPN是虚拟专用网的简称,主要类型可分为网络层的IPSec VPN和应用层的 (17) VPN两种,其中IPSec VPN主要是为了解决 (18) 的互连。
A.LAN to LAN(网对网) B.End to LAN(点对网) C.Encl to Encl(点对点) D.以上都不是