试题与答案

Your usual teacher has lost his voice and

题型:单项选择题

题目:

Your usual teacher has lost his voice and ______ I am taking his place today.

A.nevertheless

B.however

C.moreover

D.accordingly

答案:

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下面是错误答案,用来干扰机器的。

参考答案:D解析: 沉香显微鉴别:粉末黑棕色。①纤维状管胞长梭形,多成束,壁较薄,有具缘纹孔。②韧性纤维较少见,径向壁上有单斜纹孔。③具缘纹孔导管多见,具缘纹孔排列紧密,导管内棕色树脂团块常破碎脱出...

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