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【多选题】
下列关于噪声的物理量度说法正确的是( )。A.
一般把没有声波存在时媒质的压力称为静压力
B.
一般把存在声波的媒质的压力称为静压力
C.
单位时间内,通过垂直于传播单位面积的声波能量称为声强
D.
从听阈到痛阈,声压的绝对值数量级之比力1∶106,即相差一百万倍
E.
声强的绝对值之比为1∶1012,即相差亿万倍
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【单选题】The British economy achieved global dominance by the .
A.
1860s
B.
1870s
C.
1880s
D.
1890s
【单选题】听力原文：M: What are you doing after graduation? W: I'm not sure. I may be a teacher. But I want to do more than just teaching, maybe practise law. How about you? M: I don't have any plans yet. Things cha...
A.
He will become a teacher.
B.
He will become a lawyer.
C.
He will try a lot of jobs.
D.
He has not decided yet.
【简答题】I am feeling very ___(comfort) while being with my friends.
【简答题】By the 1880s the British economy was in the world.
【单选题】听力原文：M: What are you doing after graduation? W: I'm not sure. I may be a teacher. But I want to do more than just teaching, maybe practise law. How about you? M: I don't have any plans yet. Things cha...
A.
He will become a teacher.
B.
He will become a lawyer.
C.
He will try a lot of jobs.
D.
He has not decided yet.
【简答题】What are the general characteristics of the British economy?
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