棉花沼液浸种时间为()小时为宜,不宜过长。
A.1~2
B.4~6
C.12~16
D.24~48
参考答案:D
Before the Hope Project was carried out in this poor area, children here had no ________ to education.[ ]
A. access
B. approach
C. attitude
D. attraction
说明国家发展城市社区卫生服务宏观政策已经明确的标志是2002年8月23日出台的______。