腹部器官的恶性肿瘤易转移到（）。
A.左锁骨上淋巴结
B.右锁骨上淋巴结
C.左腋下淋巴结
D.右腋下淋巴结
E.气管前淋巴结
参考答案：A
Under the Prudent Man Rule, trustees are least likely to set the proper balance of proprieties between:（）
A. principle protection and current income.
B. the interests of sponsors and the interests of beneficiaries.
C. expected income every year and probable safety of principle.
在SBT-5型同步示波器使用的过程中，希望荧光屏上波形的幅度不大于（）厘米。
A、1
B、2
C、5
D、8
