在脑室内快速注入1ml的容量,正常颅内压上升不超过()
A.5.65mmHg
B.8mmHg
C.7.15mmHg
D.4mmHg
E.10.25mmHg
参考答案:D
It can be inferred from the passage that ______
A.vanillin is easier to synthesize than benzaldehyde
B.not all synthetic flavors are harmless
C.in general, the less components there are in a fragrance, the harder it is to synthesize
D.synthesized substances must be tested for safety only if they are used in food
负压射孔确定负压差值的基本原则是()。
A.低渗透储层选择较小的负压差
B.高渗透储层选择较大的负压差
C.对于碳酸盐岩储集层可适当增大负压差
D.致密岩层选择较小的负压差
E.胶结疏松的储层选择较大的负压差