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
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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
选择合适的()和签订完整有效的设备采购合同是设备采购质量管理的重要环节。
A. 设备供应商
B. 设计工程师
C. 设备监理工程师
D. 顾客