引起机械性肠梗阻最常见的原因是（） A.腹膜后巨大血肿 B.肠壁肿瘤 C.肠蛔虫症

关于胸膜隐窝的描述正确的是（）。

A.由不同部分壁胸膜返折构成

B.由不同部分脏胸膜返折构成

C.由脏、壁胸膜在相互移行转折处形成

D.肋纵隔隐窝较浅，肺前缘能伸入

E.深呼吸时肺下缘可伸入肋膈隐窝

情感教学是一个连续的内化过程，教师应积极的促成情感教育的“积累效应”。

According to AIMR Standards of Professional Conduct Standard, which of the following activities violates Standard Ⅳ(B), Priority of Transactions An analyst:（）

A. buys shares for his personal account after all the firm’s clients have been informed and their trades completed.

B. buys stock for his own account on a personal instinct while not doing so for his clients.

C. makes trades for his firm’s account before handling the client trades.

筋瘤好发于：

A．上肢

B．面部

C．颈部

D．躯干

E．下肢

平尺是用于测量工件的直线度和平面度的测量工具。