向日葵依靠种子、月季通过扦插来繁殖的方式分别属于()
A.无性生殖、无性生殖
B.无性生殖、有性生殖
C.有性生殖、无性生殖
D.有性生殖、有性生殖
参考答案:C
We lost our way in that small village, otherwise we________ more places of interest yesterday.
A.visited
B.had visited
C.would visit
D.would have visited
经食物传播的传染病的流行特征是()
A.以散发为主
B.呈现周期性
C.呈现季节性
D.以儿童发病为主
E.一次大量污染,在用餐者中可能引起爆发