漫射照明
参考答案：
光无特定方向投射到工作面和目标上的照明。
-He's no use at all.
-__________,I have found him a great deal of use. [ ]
A. Generally speaking
B. Believe it or not
C. First of all
D. On the contrary
叙述对颅内压增高的病人预防和及时发现脑疝的要点。
