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【单选题】
将（）二叉树转换为森林时，一定只是一棵树。A.
只有左子树的
B.
只有右子树的
C.
只有左子树或右子树的
D.
既有左子树又有右子树的
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举一反三
【单选题】Can you make sure _____ the key of her flat? [ ]
A.
whether Alice had put
B.
where had Alice put
C.
where Alice has put
D.
where has Alice put
【判断题】The box plot enables the analyst to gain a sense of the central values, dispersion and shape of data.
A.
正确
B.
错误
【单选题】听力原文：W: Good evening, professor My name is Alice Brown. M: Good evening, Alice. What is your question? W: I've been studying Spanish for some years. I go to Spain on holiday sometimes. I've learnt qui...
A.
She couldn't go to Spain for holiday this summer.
B.
She couldn't communicate with Spanish people very well.
C.
She didn't learn enough Spanish vocabulary.
D.
She had few chances to speak Spanish in Spain.
【单选题】听力原文：W: I want this sweater and I'll take the scarf, too. M: Alright. The sweater is $ 21, so the total is $ 35. Q: How much does the scarf cost? (19)
A.
$ 20.5.
B.
$ 19.5.
C.
$ 18.5.
D.
$ 14.
【单选题】李先生因左下肢血栓闭塞性脉管炎入院治疗,护士指导其做Buerger运动的目的是
A.
减轻下肢水肿
B.
促进病人舒适
C.
延缓病变发展
D.
提高日常活动能力
E.
促进侧支循环建立
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