为相对原子质量的测定作出卓越贡献的我国科学家是（ ）
A．袁隆平
B．张青莲
C．杨振宁
D．丁肇中
答案：B
用柴胡疏肝理气，兼引诸药入肝经的方剂是
A．补中益气汤
B．复元活血汤
C．完带汤
D．龙胆泻肝汤
Tom likes _____ to the movies with his friends and _____ sports. [ ]
A. going; playing
B. go; play
C. going; play
D. go; playing
