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问题 单项选择题 A1型题

在将γ照相机的图像数字化的过程中，计算机采集图像的方式是（）。

A.按从上到下的顺序采集

B.按从左到右的顺序采集

C.从图像中心开始采集

D.在γ照相机启辉信号的控制下逐次采集有效的闪烁事件

E.以上都不是

答案

参考答案：D

解析：γ照相机启辉信号已经是数字信号。

完形填空

Once there was a poor old woman. She lived by herself in a little house in a village. She didn’t have m_小题1:___ money but she was very kind.

One day a young man named Bill came to her d__小题2:__. He was very thin. He was very hungry and a__小题3:___ the old woman for help. The old woman said, “Come in and have dinner with me, but my dinner is only some potatoes.” They had d__小题4:__together. After dinner, the old woman told Bill to t _小题5:__ some potatoes with him. He thanked her and left.

Ten years later, Bill came b__小题6:_____ to the old woman’s door again and gave her a bag of m__小题7:____. She was surprised. Bill said, “Ten years ago you gave me some p_小题8:_____. I grew some potato plants. From those plants, I grew some more plants. Now I’m a r__小题9:__ farmer. But I never forget how k__小题10:__ you were to me.”
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单项选择题

家鸽的卵产下后，胚胎发育暂时停止。要使胚胎继续发育，必需的环境条件是（）。

A.一定的恒温条件

B.充足的养料

C.一定的水分

D.适当的光照
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