指定路由
参考答案:
发送方指定一信息包到达目的站点的路由,而这条路由是经过精心设计的、绕过设有安全控制的路由。
When I was younger, I’d often go for ________ drive with some friends, purely for ________ enjoyment of it.
A.a; an
B./; the
C.the; /
D.a; the
重金属检查的条件是()
A.磷酸盐缓冲液
B.醋酸盐缓冲液(pH3.5)
C.稀硝酸
D.稀硫酸
E.稀盐酸