问题
单项选择题
光纤状态的评定包括测量它的衰减度,衰减率用()来表示。
A.kb/s
B.dB
C.A
答案
参考答案:B
光纤状态的评定包括测量它的衰减度,衰减率用()来表示。
A.kb/s
B.dB
C.A
参考答案:B
用方框中所给单词的适当形式填空,使短文通顺、正确、连贯 (每个单词限用一次)。
小题1: that people who studied music as a child are able to remember words much better than people 小题2: musical training. One experiment was 小题3: with sixty female American college students. A similar study was carried out with ninety boys in Hongkong of China. In both cases, students had to 小题4: words and pictures. 小题5: they were asked how many they remembered. Scientists found that students 小题6: studied music were better at remembering words, but both groups remembered the pictures equally well. Perhaps it is 小题7: to use your imagination to associate(联想) pictures with things in your life. Also, you can make up stories for pictures.Scientists explain the 小题8: by saying that both musical memory and verbal (written or spoken words) memory are located in the left side of the brain. Visual memory, the kind needed for pictures, is located in 小题9: half of the brain. Since verbal memory is very important for success at school, researchers now think that taking music lessons can give you a real academic advantage. In fact, when the students were tested a year 小题10: , the students who had stopped taking lessons still did well on verbal memory. Maybe it’s time to give music lessons a try. |
据中国汽车工业协会统计,2004年1~7月,我国汽车累计产量突破300万辆,达到303.05万辆,同比增长23.5%。 累计销售289万辆,同比增长20.6%,产销率为95.6%。其中,轿车累计产销144.89万辆和133.55万辆,同比分别增长30.2%和27.1%;客车累计产销73.37万辆和70.84万辆,同比分别增长20.9%和10.1%;载货车累计产销84.78万辆和85.40万辆,同比分别增长15.7%和20.4%。 与上年同期相比,整体上汽车产销仍然保持了20%以上的较快增长速度。前7个月汽车产量已接近2000年全年产量,其中轿车产量更是比2000年全年轿车产量多出近40万辆。 |
2003年1~7月,我国汽车产销率为( )。
A.97.51%
B.98.97%
C.97.66%
D.97.97%