提高胎儿对缺氧的耐受力可按医嘱用()
A.4%碳酸氢钠
B.10%葡萄糖
C.维生素C
D.50%硫酸镁
E.50%葡萄糖
参考答案:B, C, E
China has successfull y sent up the Shenzhou Ⅶ spacecraft into space________with sophisticated
devices of science and technology.[ ]
A. to be equipped
B. equipped
C. equipping
D. having been equipped
水库经济调度的综合评价指标是()。
A.水量利用率
B.耗水率
C.水能利用提高率
D.发电节水率