胃肠道的恶性肿瘤经血道首先转移到()
A．肺
B．淋巴结
C．肝
D．骨
E．脑
参考答案：C
Since Jack was laid off from his job three months ago, he a new one, but without luck.
A．looked for
B．bad looked for
C．is looking for
D．has been loking for
如何估计常模参照和目标参照测验的效度
