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【单选题】
话筒的指向性是指与话筒主轴成一定角度的入射波的频率响应特性与电平变化,单向性话筒对入射角为多少度?即正前方的声音灵敏度最高。
A.
10°
B.
C.
30°
D.
15°
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【简答题】下列语句能循环______次。 ints=12; while(s); --s;
【单选题】【C12】
A.
Because
B.
Since
C.
Once
D.
While
【单选题】【B12】
A.
Since
B.
If
C.
Unless
D.
While
【单选题】【C12】
A.
though
B.
for
C.
but
D.
while
【单选题】【C12】
A.
but
B.
whereas
C.
however
D.
while
【单选题】【C12】
A.
while study
B.
for studying
C.
studying
D.
while studying
【简答题】A.Because her parents like traveling. B.Because her parents like history. C.Because traveling in such places costs less. D.Because her parents want to reinforce the stuff they learned in school about ...
【单选题】【C12】
A.
but
B.
though
C.
and
D.
while
【单选题】【C12】
A.
unless
B.
after
C.
until
D.
while
【单选题】【C12】______
A.
As
B.
When
C.
Since
D.
While