属于家族遗传性疾病的结石是
A.碳酸盐结石
B.尿酸结石
C.草酸盐结石
D.胱氨酸结石
E.磷酸盐结石
参考答案:D
After the big earthquake, many rescue teams ________through the ruins to save survivors. [ ]
A. put
B. broke
C. looked
D. combed
梁、板是典型的()。
A.受拉构件
B.受弯构件
C.承压构件
D.受扭构件