一般机械通气撤机时的方式有()。
A.压力支持
B.控制呼吸
C.SMIV
D.T型管田
E.辅助呼吸
参考答案:A, C, D
把x3-2x2y+xy2分解因式,结果正确的是 [ ]
A.x(x+y)(x-y)
B.x(x2-2xy+y2)
C.x(x+y)2
D.x(x-y)2
My uncle _______ from the government as a result of his poor health.
A.recovered
B.resigned
C.suffered
D.returned