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【单选题】
以下2题基于如下的两个关系： 学生关系R(SNO，SNAME，AGE) 执行SQL语句：SELECT * FROM R WHERE sno IN (SELECT sno FROM S WHERE cno=“c1”)的结果中的元数和分别A.
6，9
B.
3，2
C.
5，3
D.
3，3
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】听力原文：How about going to the ski resort this weekend? (A) That' s not a bad idea at all. (B) The sky is so beautiful today. (C) It takes almost 3 hours to get there. (15)
A.
B.
【单选题】I’d rather read than watch television;the programs seem all the time.A．to get worseB．to have got wo
A.
I’d rather read than watch television;the programs seem ____ all the time. A．to get worse
B.
to have got worse
C.
that it is getting worse
D.
to be getting worse
【单选题】- What TV programs are you watching these days? - Well, I’d rather read than watch TV. The programs seem ________ all the time.
A.
to get worse
B.
getting worse
C.
to be getting worse
D.
to have got worse
【简答题】科学家为了研究胰岛与糖尿病之间的关系，进行了如下实验：
实验一：切除狗的胰腺后，狗的尿液中出现了葡萄糖，并出现糖尿病的一些症状。
实验二：将正常狗的胰管结扎，一段时间后，现察到胰腺外部萎缩，只有内部的胰岛活着，狗的尿液中未检测到葡萄糖。
实验三：从狗的胰岛中提取出一种物质（被称为胰岛素），用该物质治疗患糖尿病的狗并获得成功。
请分析回答：实验一、二结果表明：（）在调节葡萄糖的吸收和利用过程中有重要...
【单选题】The primary duty of the snow ranger is______.
A.
to protect the ski area's operators
B.
to predict and control avalanches
C.
to forecast the weather
D.
to check skis and repair them
【简答题】S urrounding skin
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