称量时分析天平的读数是1.2020g,其有效数字是( )
A.1位
B.2位
C.3位
D.4位
E.5位
参考答案:E
Oh, my god! The kids are making too much _______ here. I can't do anything. [ ]
A. sound
B. voice
C. noise
D. footstep
Linda’s father hates waiting in long lines. I think he’s just not very _______.
A.patient
B.talented
C.popular
D.powerful