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【简答题】
把两端开口的玻璃管的下方用一薄塑料片拖住(塑料片重量不计),放入水面下 12cm 处,然后内缓慢倒入密度为 0.8 × 10 3 kg/m 3 的煤油,当塑料片开始下沉时,煤油在的高度是多少?
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反馈参考答案：
举一反三
【单选题】Call me, write to me, email me; ________, let’s keep in touch.
A.
came over
B.
at any rate
C.
interference
D.
fading
【单选题】Call me, write to me, email me; __, let's keep in touch.
A.
over and over
B.
at any rate
C.
in unison
D.
know better than that
【单选题】Call me, write to me, email me; ,let's keep in touch.
A.
besides
B.
in addition to
C.
what's more
D.
at any rate
【简答题】Call me, write to me, email me;____________, let’s keep in touch.
【单选题】若传热系数 K 满足公式: 1.PNG ,当ao >>ai 时,为了提高 K 值,最有效的途径是( )。
A.
ao 提高
B.
ai提高
C.
ai、ao同时提高
D.
不能确定
【简答题】Water cannot resist(反抗) a pressure(压力) exerted on it in only one direction, the way, for example, a block of steel(钢块) can when it resists being squeezed(挤压) in a vise(台钳).
【单选题】Call me, write to me, email me; __, let's keep in touch.
A.
in unison
B.
at any rate
C.
narrow down
D.
over and over
【单选题】They don’t know what their problems are, so they will first send in trained nurses to ______ the needs of each patient.
A.
guess
B.
look
C.
evaluate
D.
examine
【单选题】Call me, write to me, email me; , let's keep in touch.
A.
on any rate
B.
from any rate
C.
to any rate
D.
at any rate
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