接收器故障表示灯闪动2次表示（）。
A.主机载频故障
B.CPU故障
C.CAND总线通信故障
D.CAND及CANE均故障
参考答案：A
He tries to spend as much time as he can ______ Chinese well. [ ]
A. to study
B. studies
C. studying
D. study
诊断首先应考虑为
A．粘连性肠梗阻
B．绞窄性肠梗阻
C．麻痹性肠梗阻
D．小肠吻合口狭窄，梗阻
E．以上都不是
