题目

 According to the agreement, _____ you shall get preferred shares accounting for 8% of the whole income for your investment. A. in return                     B. in turn                             C. after all                    D. above all 答案：A现代火箭用液态氢作燃料，是因为它具有（ ）A．较大的比热容B．较低的沸点C．较高的凝固点D．较大的热值