脂肪栓塞病人死亡原因常见于下列哪一种情况
A．急性右心衰竭
B．急性左心衰竭
C．肾功能衰竭
D．脑出血
E．心肌梗死
参考答案：A
—Mrs. King, could you tell me when we ______ a field trip?
—We'll have it when all the work ______.[ ]
A. are having; will finish
B. will have; finishes
C. will have; is finished
D. have had; will be finished
黄铜是（）二元合金。
A．铜镍
B ．铜锡
C．铜锌
D．铜铝
