logo - 刷刷题
下载APP
【判断题】

棉田周围杂草丛生,对棉红蜘蛛的发生不利。

A.
正确
B.
错误
举报
参考答案:
参考解析:
.
刷刷题刷刷变学霸
举一反三

【单选题】YJ17卷烟机蜘蛛手机构抽吸槽回转至最左位置时,其()。

A.
水平速度为零,垂直速度最大
B.
水平速度最大,垂直速度为零
C.
水平速度为零,垂直速度为零
D.
水平速度最大,垂直速度最大

【单选题】In one way of thinking, failure is a part of life. In another way, failure may be a way towards success. The ―spider story‖ is often told. Robert Bruce, leader of the Scots in the 13th century, was hi...

A.
The think about the cause of your failure
B.
to check out whether your goals are right for you
C.
to consider failure as a part or life
D.
to bear in mind that you will never fail in your life
E.
to tell him that he should cheer up
F.
To warn him that failure is terrible

【多选题】防治红蜘蛛的药剂可选用()

A.
吡虫啉
B.
阿维菌素
C.
克螨特
D.
双甲脒