光的传播速度是3×105千米/秒。[ ]
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阅读理解
看家谱, 判断正(T) 误(F) .
( )1. Sally Brown is Sonia's mother.
( )2. Sandra is Tommy's sister.
( )3. David is Sonia's father.
( )4. William Brown is Sandra's grandmother.
( )5. Tommy is Sonia's cousm.
高压氧治疗的压力单位是()
A.Pa
B.kPa
C.ATA
D.TAT
E.TNT