搜题请搜索小程序“爱下问搜题”
问题 单项选择题 A1型题

呈半球形，外果皮棕褐色至褐色，密被凹点状油室，切面边缘散有1~2列油室，气清香，味苦、微酸的药材是（）

A.木瓜

B.连翘

C.枳壳

D.栀子

E.金樱子

答案

参考答案：C

单项选择题

One ofthe main resposibilities ofICMP is to report  （） . Although technology hasproduced increasingly relaible transmission media, errors still exist and must be handled. IP isan  （）  protocol. This means that error checking and error control are not a concem ofIP. ICMP was designed, in part, to compensate for this shortcoming. Howerver, ICMP doesnot  （） errors, it simply report them. Error correction is left to the higher-levelpotocols. Error messages are always sent to the original  （）  because the only informationavailable in the datagram about the route is the source and destination IP addresses. ICMP usethe source IP address to sent the error massage to the source ofthe（）.

IP isan（）protocol.

A．reliable

B．unreliable

C．available

D．unavailable
查看答案
单项选择题

内共生菌沃尔巴克氏菌能通过胞质不相容的机制来操控果蝇的繁殖机制，因此，下列（）沃尔巴克氏菌的果蝇交配后不能成功产生后代。

A、父本母本均未感染

B、父本未感染母本感染

C、父本母本感染同一株系

D、父本母本感染不同株系
查看答案