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【单选题】
已知噪声源1的声压级为80 dB，噪声源2的声压级也为60 dB，则两个噪声源叠加后的声压级为( )dB。A.
140
B.
80
C.
81
D.
70
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举一反三
【单选题】I________at my watch and was surprised to see that it was nearly midnight. [ ]
A.
glanced
B.
observed
C.
glared
D.
stared
【简答题】Sunday was busy day. I had to get up at 5:00a.m. to attend the class activity. _______ I hurried to catch he bus to the other side of the city to tutor my new student for the whole morning. __________...
【多选题】Warmth at Midnight Canberra winters are extremely cold, and 2014 brought some of our coldest days. One weekday night I walked to the 1 supermarket before it closed at midnight. As I approached, I noti...
A.
dangers
B.
local
C.
happy
D.
reading
E.
freezing
F.
attentively
G.
potential
H.
sitting
I.
poorly
J.
given K. consumed L. circle
【单选题】It was midnight. I _____________ for five straight hours. No wonder I was getting tired.
A.
have been studying
B.
had studied
C.
had been studying
D.
was studying
【简答题】发展肌力量应遵循的解剖学依据是使肌的起点与止点在完成动作的过程中相互( )。锻炼肌肉力量的练习原则有( )原则、( )原则和 ( )原则。
【简答题】When I ________(arrive) at the hotel, it was midnight .
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