未知题型 对诊断心肌梗死最有意义的是A.淀粉酶B.血清转氨酶C.7－谷氨酰基转肽酶###SXB##

单项选择题 Please see to it ______ shipment of this order is effected during this month, since punctual shipment is one of the important consideration in dealing with our market. A．what B．that C．which D．while

未知题型 已知某水闸为平底矩形，当通过的单宽流量q=1.93m3/(s·m)时发生水跃，已测得跃后水深h2=1.46m，试判断水跃的类别并求跃前水深。