自身免疫性血小板减少性紫癜急性型多见
A．婴儿
B．幼儿
C．儿童
D．青少年
E．青壮年
参考答案：C
The bad news that they had received from doctors meant the ________ of all their hopes.[ ]
A．ruin
B．result
C．loss
D．failure
如图所示，重l0ON的物体A静止在斜面上，画出物体A所受重力的示意图．
