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【多选题】
Which three IP multicast address related statements are true?（）A.
Multicast addresses 224.0.0.13 and 224.0.0.22 are reserved link - local addresses used by PIMv2 and IGMPv3
B.
Because they would map to overlapping IP multicast MAC addresses, multicast addresses 224.0.1.1 and 238.1.1.1 could not be used toget her
C.
Multicast addresses 224.0.0.0 through 224.0.0.255 are always forwarded because they are transmitted with Time to Live (TTL) greater than 1
D.
Multicast addresses 224.0.0.5 and 224.0.0.6 are source multicast addresses for OSPF routers
E.
The a dministratively scoped multicast addresses 239.0.0.0 through 239.255.255.255 are similar in purpose to RFC 1918 private unicast addresses
F.
Multicast address 224.0.1.1 has been reserved for the Network Time Protocol (NTP) by the IANA
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【单选题】______ he did not want to, he still had to share his hotel room with a stranger.
A.
Because
B.
Even though
C.
When
D.
As if
【单选题】下列哪项不是中药药理学学科的主要特征
A.
中药药理研究必须与中医药理论紧密结合
B.
中药的研究对象多样
C.
中药药效物质形式各异
D.
中药药理学只注重中药的药效研究
E.
中药的药理作用，具有多靶点、多环节、多途径，整合调节的特点
【单选题】下列哪项不是布比卡因的药理特点
A.
起效时间约5～10min，作用维持5～6h
B.
麻醉作用和毒性均为利多卡因的4倍
C.
对酰胺类局麻药过敏者也可使用
D.
低浓度时常用于硬膜外PCA(病人自控镇痛)术后止痛和癌性止痛
E.
心血管毒性强，中毒时一旦心跳停止，复苏极为困难
【单选题】______, still he kept on working.
A.
In case he was worn out
B.
Even if he was worn out
C.
Though he was worn out
D.
Provided he was worn out
【单选题】____________ all his hard work, he still failed to finish the task in time.
A.
Although
B.
Even if
C.
Even after
D.
So long as
【单选题】下列哪项不是中药药理学学科的主要特征
A.
中药药理研究必须与中医药理论紧密结合
B.
中药的研究对象多样
C.
中药药理学只注重中药的药效研究
D.
中药的药理作用，具有多靶点、多环节、多途径，整合调节的特点
E.
中药药效物质形式各异
【单选题】He knows little of physics, and ______ of math.
A.
even more
B.
still less
C.
no less
D.
still more
【简答题】32 位处理器工作在保护方式下,用于描述内存逻辑段相关信息的是 ( ) 。 A .页描述符 B .段选择子 C .段描述符 D .中断描述符
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