简述动物寄生虫病的防治措施。
参考答案:
①定期预防性驱虫;
②外界环境除虫;
③尽量消灭传播者和中间宿主;
④加强饲养管理,增强动物的抵抗力;
⑤药物治疗
—John got injured in the game.
—Would it be at least a fortnight ______ he could recover and return to school?
A.when
B.that
C.since
D.before
在油脂性基质中有适宜的稠度和涂展性的基质是()
A.羊毛脂
B.凡士林
C.蜂蜡
D.豚脂
E.液状石蜡