计算机中采用二进制数的优点
参考答案：
（1）便于用电子器件模拟表示（2）节约设备（3）运算简单（4）具有稳定性。
Questions 1-4
What reason does the man give to deny the existence of a living monster in Loch Ness？（）
A．No one has provided an accurate description of the animal.
B．No dead bodies of the animal have ever been found.
C．There are only 500 species living in Loch Ness.
D．The lake is not deep enough for such a huge animal.
对于大多数原发性骨肿瘤，诊断依靠（）。
A.术中所见
B.临床表现
C.病理
D.影像学检查
E.临床表现、影像、病理结合
