下列哪些单板的槽位是固定的()
A、OHP
B、OSC
C、CA
D、APSF
参考答案:A, B, C, D
大小肠交接处为()
A.幽门
B.魄门
C.阑门
D.贲门
E.气门
After retirement, Mr. Mike ______ drawing, which he had always loved but had not had time for.
A.took up
B.got up
C.help up
D.looked up