胸膜腔是脏、壁胸膜相互移行，形成封闭的潜在性间隙，左右各一，呈负压。
查看答案
肋膈隐窝由肋胸膜与膈胸膜返折形成，胸膜腔积液首先积存于此。
A. 对
B. 错
1. What’s the weather like in the morning?
A. Sunny.
B. Rainy.
Cloudy.
2. And the low temperature is _____ degrees.
A. Seventeen
B. Twenty-seven
C. Fifteen
3. It is likely to be _______ tomorrow afternoon.
A. windy
B. rainy
C. cloudy
微信支付 
支付宝支付