血精的主要原因是:()
A.前列腺肿瘤
B.饮酒过度
C.阴囊外伤
D.嗜食辛辣
E.房事过度
参考答案:E
---How do you like your Chinese teacher? ---_____.
A.He is very kind
B.Yes, I like him very much
C.No, I dislike him
D.He is much better now
康明斯原装的电路图为彩色图,紫色代表ECM向()提供控制信号的控制信号线。
A.输出设备
B.输入设备
C.辅助设备
D.动力设备