血清乳酸脱氢酶不增高的是（）.
A.急性心肌梗死
B.恶性肿瘤
C.慢性支气管炎
D.肝硬化
E.骨骼肌损伤
参考答案：C
It was not until he got to the office _____ he remembered _____ the key home.[ ]
A. when, leaving
B. when, to leave
C. that, leaving
D. that, to leave
火箭降落伞火焰信号垂直发射的高度不少于500m。（）
