單項(xiàng)選擇題
A.1/3~1/4 B.1/5~1/6 C.1/7~1/8 D.1/9~1/10
A.20% B.25% C.45% D.55%
A.10% B.20% C.25% D.30%
A.35% B.45% C.55% D.65%
A.10% B.20% C.30% D.50%
A.15% B.25% C.35% D.45%
A.1/2 B.7/10 C.4/5 D.9/10
A.4%~5% B.7%~8% C.2%~3% D.9%~10%
A.40° B.50° C.57.3° D.90°
A.動(dòng)穩(wěn)性 B.初穩(wěn)性 C.大傾角靜穩(wěn)性 D.縱穩(wěn)性
A.2.3 B.2.0 C.1.8 D.1.5