题型:问答题 --Do you have a dictionary? I want to________some new words in it.---Yes, I do. Here you are.A.look forB.look upC.look throughD.look over 查看答案
题型:问答题 计算:(1)(x2)8•x4÷x10-2x5•(x3)2÷x.(2)3a3b2÷a2+b•(a2b-3ab-5a2b).(3)(x-3)(x+3)-(x+1)(x+3).(4)(2x+y)(2x-y)+(x+y)2-2(2x2-xy). 查看答案
题型:问答题 关于各种营养素的需要量正确的是( )A.每日总热量约需3000kcalB.妊娠最后3个月总热量需求量更有所增加C.糖的供给量应占总热量的25%~30%D.脂肪的供给量应占总热量的55%~60%E.妊娠后期蛋白质每日总量约需80~90g 查看答案