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【单选题】
革兰阴性细菌对溶菌酶不敏感的原因是A.
细胞壁缺乏磷壁酸
B.
细胞壁含脂多糖多
C.
细胞壁含糖量少
D.
细胞壁含肽聚糖少,在肽聚糖层外还有外膜
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举一反三
【单选题】Chen Guangbiao says he ______ all his money to charities when he dies. [ ]
A.
leaves
B.
left
C.
will leave
D.
would leave
【单选题】_______ today, he would get there by Saturday. [ ]
A.
If he leaves
B.
Was he leaving
C.
Would he leave
D.
Were he to leave
【简答题】计算图中的电压U,分析各元件的功率状态,并讨论其功率平衡。
【单选题】______ today, he could get there by Friday.
A.
If he leaves
B.
Was he leaving
C.
Were he to leave
D.
Would he have left
【单选题】______today, be would get there by Friday.
A.
Were he leave
B.
Was be leaving
C.
Were he to leave
D.
If he leaves
【单选题】民用建筑疏散楼梯的平台净宽度应当( c )。
A.
不小于楼梯段的净宽度
B.
不大于楼梯段的净宽度
C.
不小于楼梯段的净宽度且不小于1.10m
D.
等于楼梯段的净宽度
【单选题】______today, he would get there by Friday.
A.
Were he leave
B.
Was he leaving
C.
Were he to leave
D.
If he leaves
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