喷枪喷头的三个主要件是（）。A、喷嘴 B、调节部件 C、空气帽 D、枪体 E、针阀

A: What a fine day today! 小题1:____________________ ?

B: That sounds like a good idea. 小题2:___________________________?

A: Let's go to the little Hill.

B: Shall we take the bus there?

A: 小题3:_______________．It's not very far.

B: That will be OK. I'll ride my new bike my father bought me for my birthday last month.

A: 小题4:__________________?

B: Let's ask Mary and Jack to go with us. They planned to go last Sunday but it rained.

A: Good! I'm sure they will be happy.

B: Have you got any idea what we are doing there?

A: 小题5:__________________________-.

B: That will be fun.

关于对照组实验的叙述，正确的是 [ ]

A．为了简化实验，提高效率

B．根据实际情况而定看是否需要

C．为了实验的科学性，一定要设置 　

D．为了实验结果的准确，可多设置几组无关变量的对照实验

男性，67岁，肺源性心脏病急性加重期患者。血气分析：pH 7.25、PaCO₂ 9.3kPa(70mmHg)、HCO^-330mmol/ L。对其酸碱失衡的治疗措施应为

A．静脉滴注5%碳酸氢钠

B．静脉滴注盐酸精氨酸

C．给予利尿剂

D．补充氯化钾

E．改善通气功能

The GMDSS defines four sea area based on the（）.

A.location and capacity of the facilities located on board ships

B.Position and type of a sincre sintion

C.Capacity and location of shore based communication facilities

D.Position and capacity of mobile communication stations

患者，男，54岁。常于安静时突发胸骨后疼痛，每次约半小时，含硝酸甘油片不能缓解。心电图示有关导联ST段抬高。诊断为心绞痛，其类型是

A．稳定型

B．变异型

C．卧位型

D．中间型

E．恶化型