问题
单项选择题
决定微机运算速度快慢的最主要硬件是（ ）。
A．主板
B．CPU
C．内存储器
D．硬盘运速
答案
参考答案：B
解析：决定微机运算速度快慢的最主要硬件是中央处理器(CPU)。故选B。
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决定微机运算速度快慢的最主要硬件是（ ）。
A．主板
B．CPU
C．内存储器
D．硬盘运速
参考答案：B
解析：决定微机运算速度快慢的最主要硬件是中央处理器(CPU)。故选B。
An analyst does research about hypothesis testing and conducts a significance test to determine if the relationship between two variables is real or the result of chance. His null hypothesis is that the population correlation coefficient is equal to zero and his alternative hypothesis is that the population correlation coefficient is different from zero. He develops the following information:
| Value of the test statistic | 1.7081 |
| Critical value at the 0.05 significance level | 1.96 |
| Critical value at the 0.01 significance level | 2.58 |
A. one-tailed test and can reject his null hypothesis.
B. two-tailed test and can reject his null hypothesis.
C. two-tailed test and can not reject his null hypothesis.