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问题 单项选择题

位于下颌舌侧的连接杆是

A．前腭杆
B．后腭杆
C．中腭杆
D．侧腭杆
E．舌连接杆

答案

参考答案：E

解析：舌连接杆为位于下颌舌侧的连接杆，位于下颌舌侧龈缘与舌系带、黏膜皱褶之间。

单项选择题

Each machine supporting TCP has a TCP transport entity, either a library procedure, a user process, or part of the kernel. In all case, it manages TCP streams and (1) to the IP layer. A TCP (2) Accepts user date streams from local process, breaks them into pieces not exceeding 64KB, and sends each piece as a separate IP (3) .When datagrams containing TCP date arrive at a machine, they are given to the TCP entity, which reconstructs the original byte streams.
The IP layer gives no guarantee that datagrams will be delivered properly, so it is up to TCP to time out and (4) them as need be. Datagrams do arrive may well do so in the wrong order, it is also up to TCP to (5) them into messages in the proper sequence.

A．connection

B．file

C．entity

D．destination
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单项选择题

城市可持续发展评价指标体系中，目标层的综合指标是（）

A.持续度

B.发展水平

C.满意度

D.协调度
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