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【单选题】
感应体震动大/声音响你应该紧固那个部件螺杆
A.
感应器和炉连接螺杆
B.
感应器和过渡法兰螺杆
C.
水套螺杆
D.
线圈固定螺杆
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举报参考答案：
举一反三
【单选题】人耳最敏感的声音频率范围是
A.
16～20 000 Hz
B.
50～5 000 Hz
C.
300～5 000 Hz
D.
1 000～4 000 Hz
【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s surface, a visitor might assume that the canyon had been caused by some ancient convulsion...
A.
it was caused by some ancient convulsion
B.
its presence is an embarrassment to the state of Colorado
C.
it looks like an injury on the Earth’s surface
D.
it has caused many visitors to injure themselves
相关题目：
【单选题】人耳最敏感的声音频率范围是
A.
16～20 000 Hz
B.
50～5 000 Hz
C.
300～5 000 Hz
D.
1 000～4 000 Hz
【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s surface, a visitor might assume that the canyon had been caused by some ancient convulsion...
A.
it was caused by some ancient convulsion
B.
its presence is an embarrassment to the state of Colorado
C.
it looks like an injury on the Earth’s surface
D.
it has caused many visitors to injure themselves
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