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【单选题】
,患有胃溃疡出血,经治疗出血停止,病情缓解,大便潜血试验阳性。提问:患者出血期间大便颜色呈( )A.
果酱色
B.
暗红色
C.
黄褐色
D.
鲜红色
E.
柏油色
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举一反三
【单选题】—Is Alice still performing? —I'm afraid not. She is said _______ the stage already as she has become a director.
A.
to have left
B.
to leave
C.
to have been left
D.
to be left
【单选题】I'm sorry to have you waiting so long for Marcia, and I'm afraid it'll be ten minutes _______ she comes back. [ ]
A.
before
B.
after
C.
until
【单选题】— Could I speak to Miss Smith, please? — ______. She's gone to the post office. [ ]
A.
I'm afraid not
B.
I think so
C.
Certainly you can
D.
I'm not sure
【单选题】—How anxious Ruby is! I wonder what on earth she ________. —I’m afraid nobody knows. She is always so strange.
A.
has expected
B.
will expect
C.
will have expected
D.
is expecting
【单选题】— Is Alice still performing？ — I’m afraid not. She is said the stage already as she has gone ab
A.
— Is Alice still performing？ — I’m afraid not. She is said ____ the stage already as she has gone abroad for further study. A．to leave
B.
to have left
C.
to be left
D.
to have been left
【单选题】----- Why hasn’t she come to the party? ----- I’m afraid she can’t. She is _______ in preparing her graduation paper.
A.
covered
B.
filled
C.
occupied
D.
crowded
【简答题】细小孔隙内的毛细水既受重力作用，也受表面张力即（ ）作用。
【简答题】如何选用接触器?(请使用语音功能回答)
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