新药的临床试验分为()、()、()、()。

伯努利方程式中位置水头是相对基准面而言的，基准面()(A)必须是海平面

A.必须低于管线

B.只要是水平面就可以

C.只要是平面就可以

荔枝肉、佛跳墙是福建菜的代表。（）

While troubleshooting a network connectivity problem, a technician observes steady link lights on both the workstation NIC and the switch port to which the workstation is connected. However, when the ping command is issued from the workstation, the output message "Request timed out." is displayed. At which layer of the OSI model does the problem most likely exist（）。

A.the session layer

B.the protocol layer

C.the data link layer

D.the access layer

E.the network layer

F.the application layer

在Excel中，在输入公式时输入=C3+C4+C5+C6与输入=SUM(C3:C6)完全等效。

此题为判断题(对，错)。

The network administrator is asked to configure 113 point-to-point links.Which IP addressing scheme best defines the address range and subnet mask that meet the requirement and waste the fewest subnet and host addresses?（）

A.10.10.0.0/18 subnetted with mask 255.255.255.252

B.10.10.0.0/25 subnetted with mask 255.255.255.252

C.10.10.0.0/24 subnetted with mask 255.255.255.252

D.10.10.0.0/23 subnetted with mask 255.255.255.252

E.10.10.0.0/16 subnetted with mask 255.255.255.252