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问题 单项选择题

晶体三极管共发射极接法时，信号从（）两端输出。

A.b、e两端输入，c、e

B.e、b两端输入，b、c

C.b、c两端输入，e、c

D.c、e两端输入，b、c

答案

参考答案：A

填空题

根据句意及首字母提示补全单词。

1. The little shy girl got n_____ when she saw the head teacher coming towards her.

2.Her friends all believe what she said,because she is always t_____ to words.

3. Jack wanted to post this letter,so he went to the post office to buy some stamps and an e_____.

4. You are so l_____ to have such good and patient teachers.

5. The weather was bad and the food was so terrible. My holiday was very d_____.
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单项选择题

（174～176 题共用题干）夏季，某牛场四分之一的牛单眼或双眼羞明、流泪、眼睑痉挛，眼分泌物增多；角膜周边可见新生血管，角膜浑浊，严重者出现角膜溃疡。体温40.5～41.5℃，精神沉郁，食欲不振。

确诊该病最好采用

A．检眼镜检查

B．角膜成像检查

C．微生物学检查

D．阿托品散瞳检查

E．荧光素点眼试验
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