车门故障切除后，即使关闭所有车门，“门全关”灯也不会亮。
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0ur starboard derrick boom of hatch No.4 is baddly cracked（）that it has become entirely useless.
A. at its goose neck to such a extent
B. at it's goose neck to such an extent
C. at it's goose neck for such a extent
D. at its goose neck to such an extent
农民在塑料棚中种蔬菜，雨过天晴后，要将塑料棚上的积水放掉，这是为什么？
从事医疗器械批发业务的经营企业应当销售给具有资质的经营企业或者使用单位。
A. 正确
B. 错误
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