下列关于溶组织内阿米巴的描述错误的是 A．生活史有滋养体和包囊两个期 B．滋养体按其

计算 （-1）²+（-1）³等于（　　）

A．2

B．0

C．-1

D．-2

When I was living in London, there was a church which was easily ________from my home.

A．accessible

B．convenient

C．available

D．possible

气管的上皮由（）、（）、（）、（）和（）等细胞组成。

吗啡的适应证是

A．肺心病
B．支气管哮喘
C．心源性哮喘
D．分娩止痛
E．颅脑损伤颅内高压

Investment in product quality improvement, especially defect prevention and appraisal, can often be borne by ______ .

A．the organization

B．the project management team

C．executive management

D．the project