肺源性心脏病降低肺动脉高压最关键的是()
A.利尿剂
B.呼吸兴奋剂
C.纠正缺氧
D.支气管扩张剂
E.强心剂
参考答案:C
电动机工作时,电能转化_______能;家用电器中应用了电动机的有________等(填一种家用电器)。
Many Children ________ the Internet , and _____had a bad effect on their studies.
A.are addicted to; it
B.get engaged in; which
C.are related to; what
D.are addicted to; which