新生儿颅脑声像图上见到透明中隔充满无回声的腔称为（）。
A.中间体
B.侧脑室
C.第三脑室
D.透明中隔腔
参考答案：C
They ________ to enter the building by the back door; however, the front door was locked.
A．are supposed
B．aren’t supposed
C．weren’t supposed
D．were supposed
某泥石流流域呈狭长形，形成区不明显，松散物质主要来自中游地段，泥石流沿沟谷有堆积也有冲刷搬运，形成逐次搬运的再生式泥石流，该泥石流的类型不应定为( )。
A．型泥石流流域 (
B．型泥石流流域 (
