21-三体综合症的临床特点是
A.皮肤、虹膜色泽变浅B.发热、咳嗽C.特殊面容D.腹泻、呕吐E.皮疹
参考答案:C
I spent five hours repairing the car. The work was ____ simple.
A.nothing but
B.anything but
C.something of
D.all except
轧制时轧辊对轧件的压力()。