肾门伸入肾实质的空隙（）。
A.肾大盏
B.肾蒂
C.肾小盏
D.肾门
E.肾窦
参考答案：E
世界上最大的山系是 （ ）
A．喜玛拉雅山脉
B．科迪勒拉山系
C．阿尔卑斯山脉
D．乌拉尔山脉
--- What did the professor tell you to do?
--- I had to write a ________ report.
A．three-thousand words
B．three thousands word
C．three-thousand-word
D．three-thousand-words
--- I had to write a ________ report.