甲未经授权以乙的名义订立合同，该合同的性质为（）
A.绝对无效合同
B.相对无效合同
C.效力待定合同
D.无权代理合同
参考答案：C
My uncle ____the golf club for two years. [ ]
A. has joined
B. has been in
C. has gone to
D. has been to
对脑膜刺激征明显的患儿应注意( )
A．及时腰穿以确立诊断B．一般不立即做腰穿以防止脑疝C．需立即吸氧D．需快速输液E．须物理降温
