胸膜摩擦感可于下列哪个时相触及
A.吸气早期
B.呼吸两相均可
C.呼气末
D.屏气时
E.咳嗽时
参考答案:B
用适当的方法解一元二次方程
(1)5t2=t
(2)(3x+2)2-5=0.
What an ___ game! I’m really __ at it.
A.excited; excited
B.exciting, excited
C.excited, exciting
D.exciting; exciting