船舶的上层建筑是指在干舷甲板上从舷边跨到舷边或其侧壁板离舷侧板向内不大于船宽B的（）的甲板建筑物。
A、1％
B、2％
C、4％
D、5％
参考答案：C
Two lawyers have donated $50,000 to ________ our school’s campaign “Help the Needy”, which was started by our former headmaster three years ago.
A．sponsor
B．launch
C．organize
D．plan
哪项是糖尿病病人失明的主要原因
A．视网膜剥离B．白内障C．青光眼D．视网膜微血管瘤E．视网膜出血
