对流只发生在液体中。
参考答案:错
The old woman __________ her son and daughters _______ and see her from time to time.
A.desired; come
B.hoped; to come
C.desired; coming
D.suggested; to come
关于蛛网膜囊肿,下列哪项是不正确的()
A.位于蛛网膜和脑膜之间
B.先天性者与蛛网膜下腔不相通
C.继发性者多与蛛网膜下腔之间有狭窄的通道相通
D.囊肿可致邻近颅骨变薄、膨隆
E.临床症状与囊肿的大小及所在部位相关