皮皮学,免费搜题
登录
搜题
【判断题】
三端集成稳压器 CW7812 的输出电压为负 12V。 ( )
A.
正确
B.
错误
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】可以代换下图所示组合电路的一个门电路是( )
A.
与非门
B.
或非门
C.
与或非门
D.
异或门
【简答题】—Did Linda see the traffic accident? —No, no sooner __________ than it happened. A.had she gone B.she had gone C.has she gone D.she has gone
【单选题】当你在昆明旅游时,你应当选择什么地图作为导游图
A.
昆明地形图
B.
昆明气候图
C.
昆明工业图
D.
昆明城市图
【单选题】在一定的温度下空气所能容纳水汽量的最大限度,称为
A.
相对湿度
B.
绝对湿度
C.
饱和湿度
D.
露点
【单选题】听力原文:M: Did you see the diamond ring Bill gave to Linda? W: I sure did. It must have cost him a fortune. Q: What does the woman imply about the ring? (5)
A.
Linda didn't like it.
B.
Bill lost it.
C.
It was very expensive.
D.
It was very small.
【单选题】- Did Linda see the traffic accident? - No, no sooner _____ impossible now does seem possible. [     ]
A.
had she gone
B.
she had gone
C.
has she gone
D.
she has gone
【单选题】使字段的输入值小于100的约束是__________
A.
CHECK
B.
PRIMARY KEY
C.
UNIQUE KEY
D.
FOREIGN KEY
【简答题】I.(1)CH 3 OH(1)、H 2 的燃烧热分别为:725.5 kJ/mol和285.8 kJ/mol,写出工业上以CO 2 、H 2 合成CH 3 OH(1)的热化学方程式: 。 (2)右图为光电解水的装置,写出光照时半导体电极表面发生的电极反应式________。目前应用最多的半导体材料是Si,甚至有人提出硅是“21世纪的能源”,硅可作为新能源的原因可能的是 (填字母)。 a.在自然界中存...
【单选题】听力原文:M: Did you see the diamond ring Bill gave to Linda? W: I sure did. It must have cost him an arm and a leg. Q: What does the woman imply about the ring? (17)
A.
Linda didn't like it.
B.
Bill lost his arm and leg in order to get the ring.
C.
The ring was very expensive.
D.
Bill was injured.
【单选题】以NaOH 和H 2 0 2 为化学发光启动试剂的标记物是
A.
吖啶酯
B.
三联吡啶钌
C.
四甲基联苯胺
D.
三丙胺
E.
AMPPD
相关题目: