_____ regular training in nursing, she could hardly cope with the work at first.
A. Not received
B. Since receiving
C. Having received
D. Not having received
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Arriving at the bus stop, _____ waiting there.
A. a lot of people were
B. he found a lot of people
C. a lot of people
D. people were found
一根重2600Kg规格为Φ600mm长2000mm的TC11的自耗电极，要化成Φ700mm的成品铸锭，铸锭补缩需要消耗自耗电极195Kg;，按工艺规定熔化结束跳闸时自耗电极剩余厚度为20mm。试计算开始补缩时行程为多少？
电子束冷炉床熔炼法具有传统熔炼法不具备的优异功能，请简答电子束冷炉床与传统熔炼法相比有哪些优异功能？
The first task of a brochure is to _______.
A. save space
B. save cost
C. attract attention
D. be beautiful
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