相对密度最大的溶剂是()
A.MeOH
B.CCl4
C.EtOAc
D.Et2O
E.H2O
参考答案:B
根据音标提示写出单词,完成下面的短文。
This is a ['f[Jt[J] of my family. The man on the [rait] is my father. He's a
['w\:k[]. The woman with glasses is my mother. She's a [gJd] teacher. Who's the girl in the ['midl]? It's me, Helen Green!
下列说法错误的是( )。
A.处方为开具当日有效。特殊情况下需延长有效期的,由开具处方的医师注明有效期限,但有效期最长不得超过3天B.每张处方只限于一名患者的用药C.年龄必须写实足年龄,婴幼儿写日、月龄。必要时,婴幼儿要注明体重。西药、中成药、中药饮片要分别开具处方D.西药、中成药处方,每一种药品须另起一行。每张处方不得超过4种药品E.药品剂量与数量一律用阿拉伯数字书写