surface defect detector的中文意思是（）。

A . 正确 B . 错误

A . A、焊缝检测仪； B . B、张力矫直机； C . C、镀液带出槽； D . D、白边；

A . deep water B . shallow water C . stiff soils D . soft soil

A . smoky exhaust B . starting failure C . overload D . over speed

A . 委托 B . 佣金 C . 瑕疵 D . 公告

A . A、底片因刮伤、擦伤、手纹、污染等造成的显示 B . B、照相技术不良、扭曲、几何形状变化等产生的显示 C . C、物件中属于正常结构以外的不连续状况 D . D、会损害到物件的使用，或超出规范、标准

A . the engine crankcase B . the engine scavenge boxes C . drain tanks D . fuel tank

A . detract B . extract C . pump up D . pump dow

A . parallel to the longitudinal direction of the chain B . perpendicular to the direction of the anchor chain C . diagonally across the link of the anchor chain D . around the circumference of the chain link

A . engine power losses B . smoking due to unburned fuel C . high exhaust temperature readings D . all of the above

A . fuel oil vapor at the sludge tank vent B . unburned fuel vapors in the scavenge air receiver C . lube oil vapors in the crank case D . lube oil vapors in the engine room

A . smoky exhaust B . starting failure C . ignition relay D . over speed

A . should be paved B . should be cleaned C . should be dismantled D . should be welded

A . smoky exhaust B . starting failure C . overload D . over speed

A . A、控制网络 B . B、火灾盘 C . C、检测器 D . D、控制器

A．A.control friction and wear B．B.improve corrosion resistance C．C.change physical property D．D.alter dimension and vary appearance

A．MT932后期保养成本低 B．MT932可实现多通道监测 C．MT932购买成本更低 D．MT932有三个EMO信号输出

Scientists have discovered a genetic defect that appears to cause deficit-hyperactivity disorder, more commonly known as hyperactivity. People afflicted with this disorder have trouble focusing their attention and controlling impulses, and tend to be rest-less and aggressive. The defect occurs in a gene that regulates the body's use of the thyroid hormone. This finding was made in continuing study organized by the National Institute of Diabetes and Digestive and Kidney Diseases in which 70 percent of children inheriting the gene were hyperactive while only 20 percent of the children not inheriting the gene were hyperactive. And although the researchers admit that this defective gene probably accounts for only a fraction of cases of hyperactivity, this discovery will allow doctors to spot newborn babies likely to have the disorder, and also to provide clues for its cause and treatment.

A．A型 B．B型 C．C型 D．D型 E．E型