用化学符号表示:①氢元素――;,②一个钠离子 ;③三个碳原子 3C ;④氧化镁 ;⑤硫酸 ;⑥一种常见的氮肥 。
H Na+ 3C MgO H2SO4 NH4NO3
可以用来辅助诊断溶血性贫血的最好指标是()
A.红细胞
B.白细胞
C.血小板
D.网织红细胞
E.血红蛋白
—Could you tell me ______ the Great Wall?
—The day after tomorrow. [ ]
A. when will you visit
B. when you will visit
C. when would you visit
D. when you would visit