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【单选题】
在处理含有金属离子的废水样品时,通常在水样中加入 ____, 以防止金属离子的沉淀。A.
H 2 SO 4
B.
NaOH
C.
CHCl 3
D.
HNO 3
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【单选题】As we watched the panda, we stood still, ______ to one another.A．dared hardly to whisperB．hardly
A.
30. As we watched the panda, we stood still, ______ to one another. A．dared hardly to whisper
B.
hardly daring to whisper
C.
dared not to whisper
D.
not dared whisper
【单选题】留置胸腔闭式引流管的拔管指征正确的是（）
A.
24h引流液<10m1，脓液<50ml< /div>
B.
24h引流液<70mlI脓液<10ml< /div>
C.
24h引流液<50ml，脓液<20ml< /div>
【单选题】--- Where did you spot the murderer? --- It was in the cinema __________ we watched Tran formers that I saw him. I can’t remember when.
A.
that
B.
when
C.
where
D.
on which
【单选题】--We all went to the cinema except you last night. Why didn’t you come? --Because I ______ that movie twice.
A.
have watched
B.
had watched
C.
was watching
D.
would watch
【单选题】留置胸腔闭式引流管的拔管指征正确的是( )
A.
24h引流液<10m1,脓液<50ml< /div>
B.
24h引流液<70ml,脓液<10ml< /div>
相关题目：
【单选题】留置胸腔闭式引流管的拔管指征正确的是（）
A.
24h引流液<10m1，脓液<50ml< /div>
B.
24h引流液<70mlI脓液<10ml< /div>
C.
24h引流液<50ml，脓液<20ml< /div>