單項(xiàng)選擇題
A.拴保險(xiǎn)繩 B.戴好手套 C.接套管 D.猛砸
A.9.8~19.6 B.19.6~29.4 C.29.4~49 D.49~98
A.光 B.熱 C.化學(xué) D.電
A.270° B.360° C.720° D.180°
A.0.2 B.0.5 C.1 D.2
A.一 B.二 C.十 D.十二
A.20 B.30 C.50 D.100
A.0.1~0.2 B.0.2~0.4 C.0.5~1 D.2~3
A.15 B.16 C.18 D.21
A.1 B.3 C.5 D.10
A.1~1.5倍 B.2~3倍 C.1/3~2/3 D.1/7~2/7