使用毒饵的效果好坏,除本身质量外,还取决于以下那个因素()
A.投药面积
B.投药到位
C.连投一周
D.投药量
参考答案:B
传染过程的五种表现一般说来,哪种表现出现最多()。
A.病原体被消除
B.病原携带状态
C.隐性感染
D.潜伏性感染
E.显性感染
We hope the measures to control house prices,____ are taken by the government, will succeed. [ ]
A. which
B. that
C. what
D. as