问题
单项选择题 A1/A2型题
50kg正常成年人的血液总量有（）。
A.2000～2500ml
B.2500～3000ml
C.3000～3500ml
D.3500～4000ml
E.4000～4500ml
答案
参考答案：D
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50kg正常成年人的血液总量有（）。
A.2000～2500ml
B.2500～3000ml
C.3000～3500ml
D.3500～4000ml
E.4000～4500ml
参考答案：D
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3._______ music instruments (乐器). Many 4._______ of music have developed. There are so many kinds of music and you may be 5._______ in some of them. Music has different 6._______ for everyone. It is 7._______ by the old and young, men and women. It can make people happy or sad. In our 8._______ world, radios and televisions offer us lots of music, giving us enjoyment, 9._______ in a music lesson or at a concert. Music means different things to different people. Music 10._______ to the whole world. |