国家工作人员可兼职从事代理记账业务。（）
参考答案：错
Worried about the time _____, Mary had made a list of the sites she wanted to see in Beijing. [ ]
A. adequate
B. available
C. efficient
D. accessible
谷内中缺乏的必需氨基酸是（）
A、苏
B、缬
C、苯丙
D、赖
