可使体温下降的药物是A．异丙嗪 B．肾上腺素 C．麻黄碱 D．阿托品 E．东莨菪碱

在感染细胞内生成三磷酸鸟苷，抑制病毒DNA多聚酶（）

A．灰黄霉素 

B．两性霉素B 

C．金刚烷胺 

D．氟胞嘧啶 

E．阿昔洛韦

红外激光胶片和氦氖激光胶片的吸收光谱值分别是（）

A.633nm和550nm

B.633nm和360nm

C.633nm和980nm

D.820nm和633nm

E.820nm和430nm

Every spring, the park becomes ______ colourful place with lovely flowers everywhere, which is ______ absolutely fantastic sight.

A．the; the

B．a; an

C．a; the

D．the; an

It’s better to go shopping in the supermarket than ____ home for chat.

A．staying

B．to stay

C．stay

D．stayed

类风湿关节炎最早的关节症状是______

A．晨僵
B．关节痛
C．肿胀
D．畸形
E．功能障碍