在体质测量的实践中,用()来评价呼吸机能更为客观。
A.肺活量
B.肺活量绝对值
C.肺活量/体重指数
D.胸围/身高×100指数
参考答案:C
The new secretary is supposed to report to the manager as soon as she _______.
A.will arrive
B.arrives
C.is going to arrive
D.is arriving
互感器是根据()原理制造的。
A、能量守恒
B、能量变换
C、电磁感应
D、阻抗变换