一个被运动员踢出的在空中向前运动的足球所受重力的情况是[ ]
A、不受重力
B、受到向前的重力
C、比静止在地面上时所受重力小得多
D、受到竖直向下的重力
答案:D
Tom _____ his father and his father _____ young.[ ]
A. looks like; looks like
B. looks like; looks
C. looks ; looks like
D. looks; looks
急性冠状动脉综合征不包括哪些()
A.稳定型心绞痛
B.不稳定型心绞痛
C.Q波型AMI
D.非Q波型AMI
E.隐匿性冠心病