张老师将一根木料锯成9小段,每段长4公米.假如将这根木料锯成3公米的小段,一共要锯______次.
4×9÷3=12(段),
12-1=11(次),
答:需要锯11次.
故答案为:11.
●One of the main resposibilities of ICMP is to report().Although technology has produced increasingly reliable transmission media, errors still exist and must be handled.IP is an () protocol.This means that error checking and error control are not a concern of IP.ICMP was designed,in part,to compensate for this shortcoming.Howerver, ICMP does not() errors,it simply reports them.Error correction is left to the higher-level potocols.Error messages are always sent to the original () because the only information available in the datagram about the route is the source and destination IP addresses.ICMP uses the source IP address to send the error massage to the source of the () .
ICMP uses the source IP address to send the error massage to the source of the()
A.datagram
B.frame
C.service
D.protocol
我国社会保障基金筹集方式采用的是统筹分摊式。()