下列哪项因素与血栓形成无关（）
A.心血管内皮损伤
B.涡流产生
C.血小板数量增多
D.血流缓慢
E.纤维蛋白溶解酶增加
参考答案：E
No conclusion _______ about whether to tear down the old buildings for a theme park until
several discussions have been held. [ ]
A. will be reached
B. is reached
C. is being reached
D. has been reached
某计算机字长为8位，它用补码、原码或反码来表示带符号的二进制整数(最高一位为符号位)，则机器代码11111111所表示的十进制真值分别为 (6) 、 (7) 或 (8) 。
A．255
B．-255
C．127
D．-127
