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【单选题】
风湿性心脏病患者拔牙时，预防发生细菌性心内膜炎的首选药物是A.
地塞米松
B.
阿司匹林
C.
青霉素
D.
红霉素
E.
替硝唑
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举一反三
【单选题】When does a spring type single acting actuator recover?
A.
oil force is less than spring force
B.
oil force is more than spring force
C.
oil force and spring force are same
D.
none of the above
【单选题】When the headteacher announced his plan for a spring outing，the ______ of the students in the class ______ for it.
A.
majority；were
B.
most；did
C.
most；were
D.
majority；was
【单选题】You should visit the part of the country when_____.
A.
spring will come
B.
it will be spring
C.
it is spring
D.
it is coning spring
【单选题】It is _______ in Australia when it is spring in China. [ ]
A.
summer
B.
spring
C.
winter
D.
autumn
【单选题】When does a spring type single acting actuator recover?
A.
oil force is more than spring force
B.
oil force is less than spring force
C.
oil force and spring force are same
D.
none of the above
【多选题】配置一个物理接口作为一个逻辑通道的备份接口，必须的配置步骤包括（）
A.
配置好逻辑通道
B.
指定这个物理接口的备份优先级
C.
配置主备接口到目的网络的路由
D.
在逻辑通道的配置模式中指定这个物理接口为备份接口
【单选题】Spring tides occur______．
A.
when the moon is new or full
B.
when the moon and sun have declination of the same name
C.
only when the moon and sun are on the same sides of the earth
D.
at the beginning of spring when the sun is over the equator
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