休克时很少发生不可逆变化的脏器是（）
A.肾
B.心脏
C.肝脏
D.脑
E.肺
参考答案：C
The determined mother has devoted all she has to ________ her son out of trouble.
A．helping
B．help
C．have helped
D．having helped
徐州已建成的高速公路有哪5条？
