铅及其化合物主要以下列哪种形式进入人体()
A.烟
B.蒸气
C.雾
D.粉尘、烟或蒸气
E.以上都不是
参考答案:D
法的执行,是指国家司法机关根据法定职权和法定程序,用法律处理案件的专门活动。 ( )
In a Direct Method classroom, grammar is learned inductively through ______ activities.
A. listening and speaking B. translating and readingC. writing and reading D. listening and reading