在长江流域栽培温州蜜柑,初结果树一般培养()作次年主要的结果母枝。
A、春梢
B、早夏梢
C、早秋梢
D、晚夏梢
参考答案:C
—Where's your little cat?
—I'm sorry to say it _______ for two weeks. [ ]
A. died
B. has died
C. was dead
D. has been dead
有线电视分配系统中分配设备的空闲端口和分支器的输出终端,均应端接()。
A、50Ω负载电阻
B、75Ω负载电阻
C、100Ω负载电阻
D、150Ω负载电阻