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【单选题】
有关青霉素快速过敏试验法,错误的是:A.
每毫升皮试液含500u青霉素
B.
试验液滴在电极板方形头子上
C.
试验部位皮肤用注射用水擦净
D.
计时开关开5min
E.
试验部位皮肤出现白斑,也属阳性反应
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
【多选题】根据如图所示的数字通信系统模型,其中各部分与有效性和可靠性两项指标的关系,以下说法正确的是:
A.
信源编码与译码： 1 、实现 A/D 转化 2 、提高信息传输的有效性，减少码元数目和降低码元速率
B.
加密与解密：利于信息的安全性，降低有效性
C.
信道编码与译码：增强信号的抗干扰能力，降低有效性，提高可靠性
D.
数字调制与解调：形成适合在信道中传输的带通信号，提高有效性，降低可靠性
【单选题】third, you can talk your _______ and _______.
A.
hobby, interest
B.
hobbies, interests
C.
hobbys, interests
【简答题】How many parts are there in the conversation when you talk with a new friend? Usually there are________ parts in the conversation. 32. What's the first part? The first part is_______. 33. In the secon...
【简答题】Amy: Hey! You're still here? Talia: Yeah, it's the third time this week. I have so much work to do. Amy: I can see you are (1) _____ . You seem frustrated and unhappy. I can hear it in the way you tal...
【简答题】Task 10 Write down each speaker’s main points and main arguments, and discuss them with your partner about these viewpoints. Or you can talk about your viewpoints to yourself. First speaker: Main po...
【简答题】简支肋梁桥的上部结构由( )、( )、( )和( )组成。
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