用药激法调查蟑螂侵害率,所用的是什么药()
A. 氯氰菊酯
B. DDV
C. 溴氰菊酯
D. 氯菊酯
The horse latitudes are characterized by().
A. weak pressure gradients and light,variable winds
B. the formation of typhoons or hurricanes in certain seasons
C. steady winds in one direction for six months followed by wind reversal for the next six months
D. steady winds generally from the southeast in the Southern Hemisphere
.管线加油车的液压控制系统功能有联锁制动及超越、呆德曼开关及超越、热释压装置等。()
A. 正确
B. 错误
患儿8kg,患有代谢性酸中毒,欲将其20Vol%的COcp提高到30Vol%,需要1.4%碳酸氢钠量为()。
A. 40ml
B. 80ml
C. 120ml
D. 160ml
E. 200m