光电耦合电路的光耦在密封壳内进行,故不受外界光干扰。
参考答案:对
根据下列句子的意思及汉语提示,写出空缺处词的正确形式。
1. I didn't __________ (意识到) that I had left my book at home.
2. The true story made me very __________ (感动).
3. The information from the Internet is __________ (更有用).
4. Two thirds of the teachers in our school are ___________ (女教师).
5. The lazy boy always gets up late so he usually ___________ (奔跑) to school.
评估的步骤不包括()
A.调查
B.评价
C.整改
D.报告