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问题 单项选择题

重型标准贯入试验应先将标准贯入器打入土中( )，才开始记录锤击数目。

A．15cm

B．20cm

C．25cm

D．30cm

答案

参考答案：A

解析： 标准贯入试验(SPT)是一种重型动力触探法，采用质量为63.5kg的穿心锤，以 76cm的落距，将一定规格的标准贯入器先打入土中15cm，然后开始记录锤击数目。 参见《标准贯入试验》(SL 237—045—1999)。

单项选择题 案例分析题

2岁小儿，头部及右上肢全部被开水烫伤，8小时入院。病儿入院时呈嗜睡状态，皮肤发花，心音低钝，脉搏细弱，伤面大部分表皮脱落，散布水疱。

该患儿合并（）

A.心功能衰竭

B.早期毒血症

C.败血症

D.应激性溃疡

E.休克
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单项选择题

The metric assigned to each network depends on the type of protocol. Some simple protocol, like RIP, treats each network as equals. The ______ of passing through each network is the same; it is one ______ count. So if a packet passes through 10 network to reach the destination, the total cost is 10 hop counts. Other protocols, such as OSPF, allow the administrator to assign a cost for passing through a network based on the type of service required.A ______ through a network can have different costs (metrics). For example, if maximum ______ is the desired type of service, a satellite link has a lower metric than a fiber-optic line. On the other hand, if minimum ______ is the desired type of service, a fiber-optic line has a lower metric than a satellite line. OSPF allow each router to have several routing table based on the required type of service.

A．adaptability
B．scalablity
C．route
D．security
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