现采用高速旋杯式静电电喷枪喷涂轿车车身，已知喷涂时喷枪上所加的直流电压为9万V，喷涂

用句中黑体字的正确形式填空。

1．Honestly, I've been doubting his ________.

2．Nowadays, competition exists everywhere. It's no easy for a business to take the lead

   in the ________ world markets.

3．Besides physical fitness, all the parents hope their children will develop properly

   mentally as well as ________.

4．All his relatives ________ to the crime have been brought to the police station.

5．We have put an advertisement in the newspaper,________ for college graduates with

   computer skills.

单纯S₁增强可见于（）。

A.二尖瓣狭窄

B.二尖瓣关闭不全

C.甲状腺功能减退

D.心肌梗死

E.心房颤动

无机盐的生理功能不包括()

A．构成人体组织

B．维持渗透

C．维持肌肉兴奋性

D．构成生物活性物质

E．提供必需氨基酸

肝经郁火犯胃而致呕吐的呕吐物特点是（）。

A.呕吐物清稀

B.呕吐物秽浊酸臭

C.伴暗红色血

D.伴食物残渣

E.呕吐黄绿苦水

骨肉瘤的新治疗方案为（）

A.术前化疗

B.术前化疗的评估

C.手术

D.术后放疗

E.术后化疗