柴油机性能指标ge,gi,ηe,ηi之间存在如下关系()。
A.gi>ge,ηi>ηe
B.gi>ge,ηi<ηe
C.gi<ge,ηi<ηe
D.gi<ge,ηi>ηe
参考答案:D
She isn't _________ her sister Tina. [ ]
A. more smarter than
B. so smarter as
C. more smart than
D. as smart as
Each lifebuoy shall be marked in block capitals of the Roman alphabet with()of the ship.
A.the call sign and name
B.the official number and name
C.the port of registry and name
D.the port of registry and official number