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【单选题】
500mL溶液中含8g Ca 2+ ,则溶液中Ca 2+ 的浓度为()(已知M(Ca 2+ )=40g/mol)A.
4mol/L
B.
0.4mol/L
C.
2mol/L
D.
0.2mol/L
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举一反三
【单选题】Refer to the exhibit. A packet with a source IP address of 192.168.2.4 and a destination IP address of 10.1.1.4 arrives at the HokesB router. What action does the router take？（）
A.
forwards the received packet out the Serial0/0 interface
B.
forwards a packet containing an EIGRP advertisement out the Serial0/1 interface
C.
forwards a packet containing an ICMP message out the FastEthernet0/0 interface
D.
forwards a packet containing an ARP request out the FastEthernet0/1 interface
【单选题】What 8-bit field exists in IP packet for QoS?
A.
数据包中用于表示QoS的8比特字段是什么？
B.
Tos Field（Tos 字段）
C.
DSCP
D.
IP Precedence（IP优先级）
E.
Cos
【简答题】简述女性月经期间应该注意的事项。
【单选题】What 8-bit field exists in IP packet for QoS?
A.
Tos Field
B.
DSCP
C.
IP Precedence
D.
Cos
【简答题】阅读下面的短文，回答问题 [When an IP packet arrives at a router, generally the router looks at the destination address of the packet, and forwards the packet to one of its network inteces. The forwarding decis...
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