香蕉施肥有哪些方式?
参考答案:
(1)沟施。(2)穴施。(3)撒施。(4)水肥共施。(5)根外追肥。
有“黑热病”之称的是()
A.毛尾线虫病
B.类圆线虫病
C.伊氏锥虫病
D.棘球蚴病
E.利什曼原虫病
—Sorry, Mr. Wang. I didn’t finish the assignment yesterday.
Oh, you ________ have done it as yesterday was the deadline.
A.must
B.mustn’t
C.should
D.shouldn’t