Part I Listening Comprehension (15minutes)Directions: This part is to test your listening ability. It consists of 3 sections.Section A 1 A: It’s 9:00 B: It’s 9:30 C: It’s 10:00 D: It’s 10:30

管子中流体和气体的流速一般不超过（ ）。 A: 5 m/s，50 m/s B: 3 m/s，30 m/s C: 3 m/s，100 m/s D: 10 m/s，100 m/s

写出下列指令运行结果：A=ones(2,5);A(:)=1:10;s=[2 3 7];A(s)Sa=[10 20 30]A(s)=Sa

使用SOL语句将学生表S中年龄(AGE)大于30岁的记录删除,正确的命令是()。 A: DELETE FOR AGE>30 B: DELETE FROM S WHERE AGE>30 C: DELETE S FOR AGE>30 D: DELETE S WHERE AGE > 3

下列纬线中，按由南向北排列顺序正确的是（） A: 30°S、15°S、15°N、30°N B: 30°N、15°N、15°S、30°S C: 10°S、20°S、30°S、40°S D: 40°N、30°N、20°N、10°N

中国大学MOOC: 写出下列指令运行结果：A=ones(2,5);A(:)=1:10;s=[2 3 7];A(s)Sa=[10 20 30]A(s)=Sa

News Chinese women’s volleyball team will play the Korean women’s team. It will be shown at 3:30 on Friday afternoon on CCTV Channel 5. I think the Chinese team will win.What will happen? A: A volleyball game will be shown on TV. B: Chinese men’s team will take part in the match. C: It will be shown at 3:30 on Saturday afternoon.

How much of the Earth's water is fresh water? A: 1% B: 3% C: 10% D: 30%

7. 设S为平面$x+y+z=1$在第一卦限中的部分，计算$\iint\limits_{S}{xyz\ }\text{d}S$=( ) A: $\frac{\sqrt{3}}{15}$ B: $\frac{\sqrt{3}}{30}$ C: $\frac{\sqrt{3}}{60}$ D: $\frac{\sqrt{3}}{120}$

​我国中等收入阶层人数已达3亿，占全球中等收入群体的30%。‍ A: China's mid-income class has reached 300 million, accounting for 30% of the middle-income group globally. B: China's mid-income class has reached 3 billion, accounting for 30% of the middle-income group globally. C: China's mid-income class amounted to 30 million, accounting for 30% of the middle-income group globally. D: China's mid-income class amounted to 3000 million, accounting for 30% of the middle-income group globally.