病毒与动物细胞相比,它只具有[ ]
A.细胞质
B.细胞膜
C.细胞核
D.蛋白质和遗传物质
答案:D
读句子,标序号,组成完整的一段话。
( ) Is it in your bag?
( ) Thank you.
( ) No. Oh, it's here. Here you are.
( ) Good morning, Xiaohong. Can I use your pencil?
( ) Sure. Oh... But I can't find it.
关于高渗性脱水的临床表现的叙述中,下列哪一项不正确()
A.口渴
B.尿少
C.尿比重低
D.皮肤弹性差
E.神经系统表现