有一些气球，气球的个数不到50个，把这些气球平均分给6个人或8个人都少1个。最多有（ ）个气球。
47
You are performing two sums, the first is a sum of two scalar variables and the second is a matrix sum of a pair of two— dimensional arrays—size 1000 by 1000. What speedup is achieved when the calculations are performed on size 1000 processors ( )
A．50
B．100
C．999
D．none of the above
医院内感染肺炎患者痰中分离出革兰阴性双球菌，氧化酶阴性、硝酸盐还原试验阴性、动力阴性，可能是（）.
A.脑膜炎双球菌
B.不动杆菌
C.卡他布兰汉菌
D.莫拉菌
E.淋球菌
