对重的计算公式为()
A.W=G+(0.2~0.3)Q
B.W=G+(0.4~0.5)Q
C.W=G+(0.3~0.5)Q
D.W=G-(0.4~0.5)Q
参考答案:B
由词汇按一定的语法所构成的复杂的符号系统是( )。
A.语言
B.言语
C.技能
D.技巧
Our research has focused on a drug which is so ______ as to be able to change brain chemistry.
A.powerful
B.influential
C.monstrous
D.vigorous