正常参考值范围应（）
A.取双侧界限
B.取单侧界限
C.同时计算单侧和双侧界限
D.根据实际情况取单侧或双侧界限
E.以上都不是
参考答案：D
—Look, here is my new mobile phone.
—It's very nice. Could you tell me ______?[ ]
A. how much is it
B. how much it is
C. how much does it cost
D. how much it will cost
汽车单片式离合器从动盘的装配方向是（）。
A.短毂朝前
B.短毂朝后
C.任意方向安装均可
D.长毂朝前
