4G数据终端可选的主套餐只有一个系列（）个档次
A.5
B.2
C.3
D.4
参考答案：A
—What does your younger brother _____ ?
—He's short and thin. [ ]
A. think of
B. look at
C. look like
D. look of
对委托人而言，生前信托有何意义？
