患者，男，75岁。中风康复期，上、下肢活动受限，舌体胖大，有齿痕，脉沉涩。治疗应首选

慢性肺源性心脏病患者形成肺动脉高压的最重要因素是（）。

A.缺氧

B.二氧化碳潴留

C.呼吸性酸中毒

D.慢性支气管炎反复发作

E.肺小动脉炎

---Don't you think it necessary that he        to Miami but to New York?

---I agree, but the problem is        he has refused to.[ ]

A. will not be sent; that                  

B. not be sent; that

C. should not be sent; what                

D. should not send; what

—Your grandparents were very great.                           

—Yes. They supported my father’s schooling ______ they were very poor.

A．as if

B．even though

C．so that

D．what if

为了杜绝偷税骗税现象的发生，防伪税控系统在哪几个环节分别采取了有效措施。

（EMB145）油门杆作动的微动电门组件。以下哪个系统不受微电门的影响？（）

A.起落架警告系统

B.推力设置位置（TLA 78°）

C.空调系统