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【单选题】
下列凝血因子中除哪个外均为无活性的酶原?A.
因子Ⅳ
B.
因子Ⅸ
C.
因子Ⅹ
D.
因子Ⅺ
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反馈参考答案：
举一反三
【简答题】Part A Suppose you lost your suitcase in bus. According to the information below, write an essay of about 100 words to describe your lost property.
【简答题】裸子植物茎内维管束的木质部仅具______而无______，韧皮部只有______而无______及______。
【简答题】裸子植物茎内的维管束的木质部仅具____而无____,韧皮部只有____而无____及____。
【单选题】This book has been in the works so long that I have lost ______ of most of the sources found for me by the staff of the library.
A.
trace
B.
trail
C.
track
D.
touch
【单选题】This book has been in the works so long that I have lost ______ of most of the sources found for me by the staff of the library.
A.
track
B.
trail
C.
trace
D.
clue
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